./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2n_append_unequal.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 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 22:02:15,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 22:02:15,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 22:02:15,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 22:02:15,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 22:02:15,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 22:02:15,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 22:02:15,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 22:02:15,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 22:02:15,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 22:02:15,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 22:02:15,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 22:02:15,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 22:02:15,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 22:02:15,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 22:02:15,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 22:02:15,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 22:02:15,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 22:02:15,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 22:02:15,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 22:02:15,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 22:02:15,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 22:02:15,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 22:02:15,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 22:02:15,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 22:02:15,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 22:02:15,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 22:02:15,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 22:02:15,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 22:02:15,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 22:02:15,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 22:02:15,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 22:02:15,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 22:02:15,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 22:02:15,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 22:02:15,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 22:02:15,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 22:02:15,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 22:02:15,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 22:02:15,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 22:02:15,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 22:02:15,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 22:02:15,136 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 22:02:15,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 22:02:15,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 22:02:15,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 22:02:15,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 22:02:15,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 22:02:15,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 22:02:15,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 22:02:15,139 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 22:02:15,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 22:02:15,139 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 22:02:15,139 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 22:02:15,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 22:02:15,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 22:02:15,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 22:02:15,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 22:02:15,140 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 22:02:15,140 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 22:02:15,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 22:02:15,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 22:02:15,141 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 22:02:15,141 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 22:02:15,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 22:02:15,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 22:02:15,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 22:02:15,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:02:15,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 22:02:15,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 22:02:15,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 22:02:15,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 22:02:15,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 22:02:15,143 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 22:02:15,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 22:02:15,144 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 22:02:15,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2023-02-18 22:02:15,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 22:02:15,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 22:02:15,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 22:02:15,365 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 22:02:15,366 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 22:02:15,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2023-02-18 22:02:16,317 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 22:02:16,508 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 22:02:16,508 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2023-02-18 22:02:16,518 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35131b55d/67b19df82e4949fab0c56b48e9205cc7/FLAGe232a8556 [2023-02-18 22:02:16,529 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35131b55d/67b19df82e4949fab0c56b48e9205cc7 [2023-02-18 22:02:16,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 22:02:16,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 22:02:16,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 22:02:16,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 22:02:16,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 22:02:16,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61cff1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16, skipping insertion in model container [2023-02-18 22:02:16,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 22:02:16,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 22:02:16,814 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2023-02-18 22:02:16,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:02:16,826 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 22:02:16,867 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2023-02-18 22:02:16,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:02:16,890 INFO L208 MainTranslator]: Completed translation [2023-02-18 22:02:16,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16 WrapperNode [2023-02-18 22:02:16,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 22:02:16,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 22:02:16,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 22:02:16,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 22:02:16,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,942 INFO L138 Inliner]: procedures = 127, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2023-02-18 22:02:16,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 22:02:16,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 22:02:16,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 22:02:16,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 22:02:16,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,977 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 22:02:16,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 22:02:16,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 22:02:16,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 22:02:16,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (1/1) ... [2023-02-18 22:02:16,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:02:16,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:17,018 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) [2023-02-18 22:02:17,040 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 [2023-02-18 22:02:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 22:02:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 22:02:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-18 22:02:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-18 22:02:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 22:02:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 22:02:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 22:02:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 22:02:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 22:02:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 22:02:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 22:02:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 22:02:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 22:02:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 22:02:17,166 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 22:02:17,167 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 22:02:17,396 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 22:02:17,401 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 22:02:17,401 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 22:02:17,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:02:17 BoogieIcfgContainer [2023-02-18 22:02:17,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 22:02:17,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 22:02:17,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 22:02:17,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 22:02:17,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:02:16" (1/3) ... [2023-02-18 22:02:17,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bd585b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:02:17, skipping insertion in model container [2023-02-18 22:02:17,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:02:16" (2/3) ... [2023-02-18 22:02:17,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bd585b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:02:17, skipping insertion in model container [2023-02-18 22:02:17,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:02:17" (3/3) ... [2023-02-18 22:02:17,413 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2023-02-18 22:02:17,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 22:02:17,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2023-02-18 22:02:17,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 22:02:17,467 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;@e4c129f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 22:02:17,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-02-18 22:02:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 57 states have (on average 2.087719298245614) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 22:02:17,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:17,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:17,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1815964311, now seen corresponding path program 1 times [2023-02-18 22:02:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771654126] [2023-02-18 22:02:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:17,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:17,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771654126] [2023-02-18 22:02:17,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771654126] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:17,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:17,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:02:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150755218] [2023-02-18 22:02:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:02:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:02:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:02:17,708 INFO L87 Difference]: Start difference. First operand has 108 states, 57 states have (on average 2.087719298245614) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:02:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:17,818 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2023-02-18 22:02:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:02:17,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 22:02:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:17,826 INFO L225 Difference]: With dead ends: 105 [2023-02-18 22:02:17,826 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 22:02:17,827 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 [2023-02-18 22:02:17,831 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:17,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 164 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 22:02:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-02-18 22:02:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2023-02-18 22:02:17,866 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 7 [2023-02-18 22:02:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:17,867 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2023-02-18 22:02:17,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:02:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2023-02-18 22:02:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 22:02:17,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:17,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:17,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 22:02:17,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1815964312, now seen corresponding path program 1 times [2023-02-18 22:02:17,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:17,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457785061] [2023-02-18 22:02:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:17,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457785061] [2023-02-18 22:02:17,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457785061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:17,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:17,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:02:17,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455554081] [2023-02-18 22:02:17,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:17,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:02:17,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:02:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:02:17,980 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:02:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:18,051 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2023-02-18 22:02:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:02:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 22:02:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:18,055 INFO L225 Difference]: With dead ends: 99 [2023-02-18 22:02:18,056 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 22:02:18,056 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 [2023-02-18 22:02:18,058 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:18,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 22:02:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-02-18 22:02:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2023-02-18 22:02:18,067 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 7 [2023-02-18 22:02:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:18,067 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2023-02-18 22:02:18,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:02:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2023-02-18 22:02:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 22:02:18,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:18,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:18,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 22:02:18,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash -418267899, now seen corresponding path program 1 times [2023-02-18 22:02:18,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:18,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935972033] [2023-02-18 22:02:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935972033] [2023-02-18 22:02:18,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935972033] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:18,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:18,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 22:02:18,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090307547] [2023-02-18 22:02:18,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:18,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 22:02:18,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 22:02:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:02:18,316 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:18,516 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2023-02-18 22:02:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:02:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-18 22:02:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:18,525 INFO L225 Difference]: With dead ends: 102 [2023-02-18 22:02:18,525 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 22:02:18,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 22:02:18,530 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 18 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:18,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 476 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 22:02:18,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 22:02:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2023-02-18 22:02:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2023-02-18 22:02:18,548 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 14 [2023-02-18 22:02:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:18,549 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2023-02-18 22:02:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2023-02-18 22:02:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 22:02:18,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:18,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:18,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 22:02:18,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash -418267900, now seen corresponding path program 1 times [2023-02-18 22:02:18,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:18,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878659587] [2023-02-18 22:02:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:18,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:18,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:18,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878659587] [2023-02-18 22:02:18,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878659587] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:18,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:18,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 22:02:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390593045] [2023-02-18 22:02:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 22:02:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 22:02:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 22:02:18,669 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:18,803 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-18 22:02:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:02:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-18 22:02:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:18,804 INFO L225 Difference]: With dead ends: 100 [2023-02-18 22:02:18,805 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 22:02:18,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:02:18,805 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 15 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:18,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 361 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 22:02:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2023-02-18 22:02:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2023-02-18 22:02:18,809 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 14 [2023-02-18 22:02:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:18,810 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2023-02-18 22:02:18,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2023-02-18 22:02:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 22:02:18,811 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:18,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:18,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 22:02:18,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1186059880, now seen corresponding path program 1 times [2023-02-18 22:02:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:18,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521060653] [2023-02-18 22:02:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 22:02:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:18,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:18,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521060653] [2023-02-18 22:02:18,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521060653] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:18,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:18,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 22:02:18,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490889497] [2023-02-18 22:02:18,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:18,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 22:02:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:18,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 22:02:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:02:18,854 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:18,920 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2023-02-18 22:02:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 22:02:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-18 22:02:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:18,922 INFO L225 Difference]: With dead ends: 105 [2023-02-18 22:02:18,922 INFO L226 Difference]: Without dead ends: 105 [2023-02-18 22:02:18,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:02:18,923 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 9 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:18,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 241 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-18 22:02:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2023-02-18 22:02:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2023-02-18 22:02:18,934 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 16 [2023-02-18 22:02:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:18,934 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2023-02-18 22:02:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2023-02-18 22:02:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 22:02:18,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:18,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 22:02:18,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:18,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash -918895952, now seen corresponding path program 1 times [2023-02-18 22:02:18,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:18,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366820219] [2023-02-18 22:02:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:18,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366820219] [2023-02-18 22:02:19,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366820219] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:19,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:19,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 22:02:19,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225513822] [2023-02-18 22:02:19,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 22:02:19,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 22:02:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:02:19,008 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:19,072 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2023-02-18 22:02:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 22:02:19,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-18 22:02:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:19,073 INFO L225 Difference]: With dead ends: 102 [2023-02-18 22:02:19,073 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 22:02:19,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:02:19,074 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:19,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 237 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 22:02:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-02-18 22:02:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.75) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2023-02-18 22:02:19,077 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 17 [2023-02-18 22:02:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:19,078 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2023-02-18 22:02:19,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 22:02:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2023-02-18 22:02:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 22:02:19,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:19,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:19,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 22:02:19,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1802773707, now seen corresponding path program 1 times [2023-02-18 22:02:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:19,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915016782] [2023-02-18 22:02:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:19,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 22:02:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 22:02:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915016782] [2023-02-18 22:02:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915016782] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837126562] [2023-02-18 22:02:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:19,175 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) [2023-02-18 22:02:19,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 22:02:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 22:02:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:19,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 22:02:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837126562] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 22:02:19,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 22:02:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-18 22:02:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238383775] [2023-02-18 22:02:19,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:19,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 22:02:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 22:02:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 22:02:19,337 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 22:02:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:19,406 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-02-18 22:02:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 22:02:19,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-02-18 22:02:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:19,407 INFO L225 Difference]: With dead ends: 103 [2023-02-18 22:02:19,407 INFO L226 Difference]: Without dead ends: 103 [2023-02-18 22:02:19,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 22:02:19,408 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 9 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:19,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 428 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:19,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-18 22:02:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-02-18 22:02:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 98 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2023-02-18 22:02:19,411 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 31 [2023-02-18 22:02:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:19,411 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2023-02-18 22:02:19,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 22:02:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2023-02-18 22:02:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 22:02:19,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:19,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:19,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:19,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:19,618 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:19,619 INFO L85 PathProgramCache]: Analyzing trace with hash 916543363, now seen corresponding path program 1 times [2023-02-18 22:02:19,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:19,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860846640] [2023-02-18 22:02:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:19,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 22:02:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:19,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860846640] [2023-02-18 22:02:19,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860846640] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:19,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627294881] [2023-02-18 22:02:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:19,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:19,816 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) [2023-02-18 22:02:19,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 22:02:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 22:02:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:19,965 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_509 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_509))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-18 22:02:19,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:19,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-18 22:02:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:20,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:20,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627294881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:20,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:02:20,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2023-02-18 22:02:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956311962] [2023-02-18 22:02:20,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:20,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 22:02:20,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:20,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 22:02:20,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-02-18 22:02:20,020 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 22:02:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:20,221 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2023-02-18 22:02:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 22:02:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-18 22:02:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:20,222 INFO L225 Difference]: With dead ends: 114 [2023-02-18 22:02:20,222 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 22:02:20,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-02-18 22:02:20,223 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 169 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:20,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 329 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2023-02-18 22:02:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 22:02:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2023-02-18 22:02:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 97 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2023-02-18 22:02:20,232 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 32 [2023-02-18 22:02:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:20,232 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2023-02-18 22:02:20,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 22:02:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2023-02-18 22:02:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 22:02:20,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:20,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:20,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:20,440 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,SelfDestructingSolverStorable7 [2023-02-18 22:02:20,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash 916543364, now seen corresponding path program 1 times [2023-02-18 22:02:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:20,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555832688] [2023-02-18 22:02:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:20,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:20,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 22:02:20,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:20,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555832688] [2023-02-18 22:02:20,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555832688] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367391123] [2023-02-18 22:02:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:20,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:20,786 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) [2023-02-18 22:02:20,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 22:02:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 22:02:20,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:20,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:02:20,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:20,987 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 11 treesize of output 15 [2023-02-18 22:02:20,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-02-18 22:02:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:02:21,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:21,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367391123] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:21,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:02:21,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2023-02-18 22:02:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920605926] [2023-02-18 22:02:21,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 22:02:21,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 22:02:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-02-18 22:02:21,047 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 22:02:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:21,375 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2023-02-18 22:02:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 22:02:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-18 22:02:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:21,376 INFO L225 Difference]: With dead ends: 102 [2023-02-18 22:02:21,376 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 22:02:21,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-02-18 22:02:21,377 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 191 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:21,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 466 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 22:02:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 22:02:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-02-18 22:02:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2023-02-18 22:02:21,379 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 32 [2023-02-18 22:02:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:21,379 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2023-02-18 22:02:21,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 22:02:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2023-02-18 22:02:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 22:02:21,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:21,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:21,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:21,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2135424312, now seen corresponding path program 2 times [2023-02-18 22:02:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:21,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298283181] [2023-02-18 22:02:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:21,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:21,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:21,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:21,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 22:02:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 22:02:21,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:21,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298283181] [2023-02-18 22:02:21,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298283181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:21,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601645067] [2023-02-18 22:02:21,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 22:02:21,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:21,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:21,715 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) [2023-02-18 22:02:21,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 22:02:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 22:02:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 22:02:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 22:02:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 22:02:21,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 22:02:21,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601645067] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 22:02:21,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 22:02:21,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2023-02-18 22:02:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719265726] [2023-02-18 22:02:21,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:21,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 22:02:21,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 22:02:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 22:02:21,898 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 22:02:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:22,027 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-02-18 22:02:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 22:02:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-02-18 22:02:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:22,028 INFO L225 Difference]: With dead ends: 101 [2023-02-18 22:02:22,028 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 22:02:22,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 22:02:22,029 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 170 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:22,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 411 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 22:02:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 22:02:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 22:02:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2023-02-18 22:02:22,031 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 46 [2023-02-18 22:02:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:22,031 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2023-02-18 22:02:22,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 22:02:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2023-02-18 22:02:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 22:02:22,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:22,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:22,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 22:02:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:22,251 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash 568631680, now seen corresponding path program 1 times [2023-02-18 22:02:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:22,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606816443] [2023-02-18 22:02:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:22,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:22,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:22,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 22:02:22,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606816443] [2023-02-18 22:02:22,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606816443] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:22,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13228165] [2023-02-18 22:02:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:22,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:22,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:22,682 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) [2023-02-18 22:02:22,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 22:02:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 22:02:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:22,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:02:22,858 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 11 treesize of output 7 [2023-02-18 22:02:22,866 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1167 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_1167))) is different from true [2023-02-18 22:02:22,870 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1167 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_1167))) is different from true [2023-02-18 22:02:22,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:22,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2023-02-18 22:02:22,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:22,928 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 22 treesize of output 24 [2023-02-18 22:02:22,938 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1168 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1168))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:02:22,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:22,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:22,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 53 [2023-02-18 22:02:22,981 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-18 22:02:22,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:22,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-18 22:02:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 21 not checked. [2023-02-18 22:02:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13228165] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:25,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:02:25,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2023-02-18 22:02:25,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223302430] [2023-02-18 22:02:25,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:25,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 22:02:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 22:02:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=252, Unknown=5, NotChecked=140, Total=462 [2023-02-18 22:02:25,088 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 16 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 22:02:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:25,310 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2023-02-18 22:02:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:02:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 16 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2023-02-18 22:02:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:25,311 INFO L225 Difference]: With dead ends: 108 [2023-02-18 22:02:25,312 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 22:02:25,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=91, Invalid=340, Unknown=5, NotChecked=164, Total=600 [2023-02-18 22:02:25,312 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 219 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:25,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 223 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 264 Invalid, 0 Unknown, 419 Unchecked, 0.2s Time] [2023-02-18 22:02:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 22:02:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2023-02-18 22:02:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.596774193548387) internal successors, (99), 91 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2023-02-18 22:02:25,314 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 47 [2023-02-18 22:02:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:25,315 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2023-02-18 22:02:25,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 16 states have internal predecessors, (65), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 22:02:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2023-02-18 22:02:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 22:02:25,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:25,315 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:25,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:25,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 22:02:25,521 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 568631681, now seen corresponding path program 1 times [2023-02-18 22:02:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:25,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401532549] [2023-02-18 22:02:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:25,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 22:02:25,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401532549] [2023-02-18 22:02:25,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401532549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462450808] [2023-02-18 22:02:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:25,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:25,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:25,854 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) [2023-02-18 22:02:25,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 22:02:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 22:02:26,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:26,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:02:26,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-18 22:02:26,029 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1419 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1419))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:02:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:26,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:02:26,044 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 [2023-02-18 22:02:26,046 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1420 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1420))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:02:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:26,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:02:26,084 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 [2023-02-18 22:02:26,087 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1421 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1421))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:02:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:26,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:02:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 21 not checked. [2023-02-18 22:02:26,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:26,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462450808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:26,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:02:26,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-02-18 22:02:26,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164753223] [2023-02-18 22:02:26,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 22:02:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 22:02:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=167, Unknown=3, NotChecked=84, Total=306 [2023-02-18 22:02:26,141 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-18 22:02:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:26,329 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-02-18 22:02:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 22:02:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2023-02-18 22:02:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:26,330 INFO L225 Difference]: With dead ends: 103 [2023-02-18 22:02:26,330 INFO L226 Difference]: Without dead ends: 103 [2023-02-18 22:02:26,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=207, Unknown=3, NotChecked=96, Total=380 [2023-02-18 22:02:26,331 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 242 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:26,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 211 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 297 Unchecked, 0.2s Time] [2023-02-18 22:02:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-18 22:02:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2023-02-18 22:02:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 86 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2023-02-18 22:02:26,333 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 47 [2023-02-18 22:02:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:26,333 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2023-02-18 22:02:26,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-18 22:02:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2023-02-18 22:02:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 22:02:26,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:26,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:26,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:26,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:26,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1941985862, now seen corresponding path program 1 times [2023-02-18 22:02:26,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393265696] [2023-02-18 22:02:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:26,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:26,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 22:02:26,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393265696] [2023-02-18 22:02:26,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393265696] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142375913] [2023-02-18 22:02:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:26,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:26,908 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) [2023-02-18 22:02:26,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 22:02:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 22:02:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:27,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:02:27,167 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 9 treesize of output 5 [2023-02-18 22:02:27,244 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (exists ((v_ArrVal_1673 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1673))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:02:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:27,252 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 [2023-02-18 22:02:27,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:27,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 44 [2023-02-18 22:02:27,296 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 84 treesize of output 60 [2023-02-18 22:02:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-02-18 22:02:27,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:27,317 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1679 (Array Int Int)) (|v_node_create_~temp~0#1.base_48| Int)) (or (not (< |v_node_create_~temp~0#1.base_48| |c_#StackHeapBarrier|)) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_48| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_48| v_ArrVal_1679) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) 1))) is different from false [2023-02-18 22:02:27,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142375913] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:27,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:02:27,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-02-18 22:02:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522329931] [2023-02-18 22:02:27,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:27,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 22:02:27,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 22:02:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=623, Unknown=3, NotChecked=102, Total=812 [2023-02-18 22:02:27,320 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 28 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:02:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:28,062 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2023-02-18 22:02:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 22:02:28,063 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-18 22:02:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:28,064 INFO L225 Difference]: With dead ends: 143 [2023-02-18 22:02:28,064 INFO L226 Difference]: Without dead ends: 143 [2023-02-18 22:02:28,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=1190, Unknown=5, NotChecked=146, Total=1560 [2023-02-18 22:02:28,065 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 464 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:28,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 949 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1167 Invalid, 3 Unknown, 152 Unchecked, 0.6s Time] [2023-02-18 22:02:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-18 22:02:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 90. [2023-02-18 22:02:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.492063492063492) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-02-18 22:02:28,067 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 51 [2023-02-18 22:02:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:28,067 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-02-18 22:02:28,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:02:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-02-18 22:02:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 22:02:28,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:28,068 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:02:28,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:28,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:28,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1941985863, now seen corresponding path program 1 times [2023-02-18 22:02:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:28,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926596988] [2023-02-18 22:02:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:28,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:28,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:28,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 22:02:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:28,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926596988] [2023-02-18 22:02:28,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926596988] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:28,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450346947] [2023-02-18 22:02:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:28,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:28,840 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) [2023-02-18 22:02:28,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 22:02:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:29,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 22:02:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:29,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:02:29,189 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 9 treesize of output 5 [2023-02-18 22:02:29,192 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 7 treesize of output 3 [2023-02-18 22:02:29,263 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1925 Int)) (and (= |c_#length| (store |c_old(#length)| |c_node_create_~temp~0#1.base| v_ArrVal_1925)) (>= v_ArrVal_1925 12))) (exists ((v_ArrVal_1929 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_1929))) (exists ((v_ArrVal_1928 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1928))) (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2023-02-18 22:02:29,267 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1930 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1930))) (exists ((v_ArrVal_1931 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1931))) (exists ((v_ArrVal_1925 Int)) (and (>= v_ArrVal_1925 12) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1925)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-18 22:02:29,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:29,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 44 [2023-02-18 22:02:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:29,283 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 44 treesize of output 40 [2023-02-18 22:02:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:29,287 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 14 treesize of output 16 [2023-02-18 22:02:29,336 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 [2023-02-18 22:02:29,338 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 86 treesize of output 62 [2023-02-18 22:02:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-02-18 22:02:29,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:02:29,499 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_~temp~0#1.base_51| Int)) (or (forall ((v_ArrVal_1942 (Array Int Int))) (<= 0 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_51| v_ArrVal_1942) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (not (< |v_node_create_~temp~0#1.base_51| |c_#StackHeapBarrier|)))) (forall ((|v_node_create_~temp~0#1.base_51| Int)) (or (not (< |v_node_create_~temp~0#1.base_51| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_1943 Int)) (or (not (>= v_ArrVal_1943 12)) (forall ((v_ArrVal_1944 (Array Int Int)) (v_ArrVal_1942 (Array Int Int))) (<= (+ 4 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_51| v_ArrVal_1942) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (select (store |c_#length| |v_node_create_~temp~0#1.base_51| v_ArrVal_1943) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_51| v_ArrVal_1944) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))))))) is different from false [2023-02-18 22:02:29,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450346947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:29,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:02:29,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2023-02-18 22:02:29,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554863211] [2023-02-18 22:02:29,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:02:29,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 22:02:29,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 22:02:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1000, Unknown=28, NotChecked=198, Total=1332 [2023-02-18 22:02:29,502 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 33 states, 30 states have (on average 2.7) internal successors, (81), 29 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:02:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:30,783 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2023-02-18 22:02:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 22:02:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.7) internal successors, (81), 29 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-18 22:02:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:30,784 INFO L225 Difference]: With dead ends: 139 [2023-02-18 22:02:30,784 INFO L226 Difference]: Without dead ends: 139 [2023-02-18 22:02:30,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1864, Unknown=38, NotChecked=276, Total=2450 [2023-02-18 22:02:30,785 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 848 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 22 mSolverCounterUnsat, 132 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 132 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:30,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 887 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 968 Invalid, 132 Unknown, 292 Unchecked, 0.9s Time] [2023-02-18 22:02:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-18 22:02:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2023-02-18 22:02:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 88 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-02-18 22:02:30,788 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 51 [2023-02-18 22:02:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:30,788 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-02-18 22:02:30,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.7) internal successors, (81), 29 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 22:02:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-02-18 22:02:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 22:02:30,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:30,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-02-18 22:02:30,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 22:02:30,994 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,SelfDestructingSolverStorable13 [2023-02-18 22:02:30,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2085671715, now seen corresponding path program 1 times [2023-02-18 22:02:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:30,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768534450] [2023-02-18 22:02:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:30,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 22:02:31,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:31,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768534450] [2023-02-18 22:02:31,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768534450] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:31,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:31,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 22:02:31,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646291348] [2023-02-18 22:02:31,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:31,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 22:02:31,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:31,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 22:02:31,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-18 22:02:31,161 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:31,338 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2023-02-18 22:02:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 22:02:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-02-18 22:02:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:31,339 INFO L225 Difference]: With dead ends: 141 [2023-02-18 22:02:31,339 INFO L226 Difference]: Without dead ends: 141 [2023-02-18 22:02:31,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-18 22:02:31,340 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 321 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:31,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 336 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 22:02:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-18 22:02:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 94. [2023-02-18 22:02:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.408450704225352) internal successors, (100), 89 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2023-02-18 22:02:31,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 53 [2023-02-18 22:02:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:31,342 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2023-02-18 22:02:31,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2023-02-18 22:02:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 22:02:31,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:31,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-02-18 22:02:31,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 22:02:31,343 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:31,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2085671716, now seen corresponding path program 1 times [2023-02-18 22:02:31,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:31,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741683922] [2023-02-18 22:02:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:31,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 22:02:31,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741683922] [2023-02-18 22:02:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741683922] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:02:31,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:02:31,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 22:02:31,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711171427] [2023-02-18 22:02:31,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:02:31,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 22:02:31,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 22:02:31,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 22:02:31,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-18 22:02:31,605 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 22:02:31,785 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2023-02-18 22:02:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 22:02:31,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-02-18 22:02:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 22:02:31,786 INFO L225 Difference]: With dead ends: 151 [2023-02-18 22:02:31,786 INFO L226 Difference]: Without dead ends: 151 [2023-02-18 22:02:31,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-18 22:02:31,787 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 282 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 22:02:31,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 376 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 22:02:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-18 22:02:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2023-02-18 22:02:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 95 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 22:02:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2023-02-18 22:02:31,789 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 53 [2023-02-18 22:02:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 22:02:31,789 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2023-02-18 22:02:31,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 22:02:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2023-02-18 22:02:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 22:02:31,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 22:02:31,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-02-18 22:02:31,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 22:02:31,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-02-18 22:02:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:02:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1947352068, now seen corresponding path program 1 times [2023-02-18 22:02:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 22:02:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623492321] [2023-02-18 22:02:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 22:02:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:32,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 22:02:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:32,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 22:02:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:32,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 22:02:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 22:02:32,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 22:02:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623492321] [2023-02-18 22:02:32,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623492321] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 22:02:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59173366] [2023-02-18 22:02:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:02:32,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 22:02:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:02:32,716 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) [2023-02-18 22:02:32,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 22:02:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:02:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-18 22:02:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:02:32,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:02:33,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:33,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-18 22:02:33,200 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 13 treesize of output 9 [2023-02-18 22:02:33,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:33,240 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 84 [2023-02-18 22:02:33,244 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 80 treesize of output 44 [2023-02-18 22:02:33,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:33,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 148 [2023-02-18 22:02:33,416 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 117 treesize of output 85 [2023-02-18 22:02:33,420 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 56 treesize of output 34 [2023-02-18 22:02:33,426 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,427 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,428 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,429 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,535 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2516 (Array Int Int)) (v_ArrVal_2515 (Array Int Int)) (|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2515)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2516)) (= (select |c_old(#valid)| |node_create_~temp~0#1.base|) 0) (<= |node_create_~temp~0#1.base| (+ |c_#StackHeapBarrier| (- 1))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|)) |c_#valid|))) is different from true [2023-02-18 22:02:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:33,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:33,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 188 treesize of output 196 [2023-02-18 22:02:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:02:33,561 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 186 treesize of output 166 [2023-02-18 22:02:33,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:33,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 167 [2023-02-18 22:02:33,585 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,589 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,594 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 22:02:33,772 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 318 treesize of output 262 [2023-02-18 22:02:34,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:02:34,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 32 new quantified variables, introduced 190 case distinctions, treesize of input 600 treesize of output 1938