./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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-properties/simple-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:36:26,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:36:26,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:36:26,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:36:26,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:36:26,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:36:26,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:36:26,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:36:26,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:36:26,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:36:26,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:36:26,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:36:26,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:36:26,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:36:26,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:36:26,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:36:26,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:36:26,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:36:26,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:36:26,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:36:26,622 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:36:26,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:36:26,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:36:26,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:36:26,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:36:26,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:36:26,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:36:26,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:36:26,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:36:26,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:36:26,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:36:26,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:36:26,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:36:26,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:36:26,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:36:26,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:36:26,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:36:26,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:36:26,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:36:26,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:36:26,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:36:26,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:36:26,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:36:26,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:36:26,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:36:26,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:36:26,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:36:26,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:36:26,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:36:26,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:36:26,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:36:26,687 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:36:26,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:36:26,688 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:36:26,689 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:36:26,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:36:26,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:36:26,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:36:26,689 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:36:26,689 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:36:26,690 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:36:26,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:36:26,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:36:26,690 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:36:26,690 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:36:26,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:36:26,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:36:26,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:36:26,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:36:26,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:36:26,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:36:26,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:36:26,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:36:26,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2022-07-21 17:36:26,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:36:27,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:36:27,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:36:27,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:36:27,005 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:36:27,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2022-07-21 17:36:27,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a394fcef9/57184fe85ab143e49e8b87a2f1a22442/FLAG20ae5ee9f [2022-07-21 17:36:27,517 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:36:27,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2022-07-21 17:36:27,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a394fcef9/57184fe85ab143e49e8b87a2f1a22442/FLAG20ae5ee9f [2022-07-21 17:36:27,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a394fcef9/57184fe85ab143e49e8b87a2f1a22442 [2022-07-21 17:36:27,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:36:27,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:36:27,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:36:27,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:36:27,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:36:27,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:36:27" (1/1) ... [2022-07-21 17:36:27,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542a97bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:27, skipping insertion in model container [2022-07-21 17:36:27,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:36:27" (1/1) ... [2022-07-21 17:36:27,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:36:27,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:36:28,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-21 17:36:28,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:36:28,211 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:36:28,237 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-21 17:36:28,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:36:28,263 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:36:28,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28 WrapperNode [2022-07-21 17:36:28,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:36:28,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:36:28,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:36:28,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:36:28,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,302 INFO L137 Inliner]: procedures = 124, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-21 17:36:28,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:36:28,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:36:28,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:36:28,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:36:28,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:36:28,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:36:28,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:36:28,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:36:28,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (1/1) ... [2022-07-21 17:36:28,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:36:28,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:36:28,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:36:28,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:36:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-21 17:36:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-21 17:36:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:36:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:36:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:36:28,469 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:36:28,470 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:36:28,502 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-21 17:36:28,710 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:36:28,715 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:36:28,715 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:36:28,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:28 BoogieIcfgContainer [2022-07-21 17:36:28,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:36:28,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:36:28,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:36:28,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:36:28,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:36:27" (1/3) ... [2022-07-21 17:36:28,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ded539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:36:28, skipping insertion in model container [2022-07-21 17:36:28,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:28" (2/3) ... [2022-07-21 17:36:28,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ded539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:36:28, skipping insertion in model container [2022-07-21 17:36:28,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:28" (3/3) ... [2022-07-21 17:36:28,722 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2022-07-21 17:36:28,733 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:36:28,733 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-07-21 17:36:28,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:36:28,770 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c5e78e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2160828f [2022-07-21 17:36:28,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-21 17:36:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:36:28,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:28,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:36:28,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1037517224, now seen corresponding path program 1 times [2022-07-21 17:36:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228516717] [2022-07-21 17:36:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:28,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228516717] [2022-07-21 17:36:28,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228516717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:28,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:28,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:36:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806918147] [2022-07-21 17:36:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:28,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 17:36:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:29,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 17:36:29,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:36:29,009 INFO L87 Difference]: Start difference. First operand has 45 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:29,023 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-07-21 17:36:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 17:36:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:36:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:29,032 INFO L225 Difference]: With dead ends: 45 [2022-07-21 17:36:29,032 INFO L226 Difference]: Without dead ends: 39 [2022-07-21 17:36:29,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:36:29,037 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:36:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-21 17:36:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-21 17:36:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-21 17:36:29,074 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 6 [2022-07-21 17:36:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:29,075 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-21 17:36:29,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-21 17:36:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:36:29,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:29,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:29,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:36:29,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2098238120, now seen corresponding path program 1 times [2022-07-21 17:36:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244740784] [2022-07-21 17:36:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:29,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:29,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:29,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244740784] [2022-07-21 17:36:29,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244740784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:29,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:29,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:36:29,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569306618] [2022-07-21 17:36:29,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:29,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:36:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:36:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:36:29,176 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:29,276 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-21 17:36:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:36:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:36:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:29,278 INFO L225 Difference]: With dead ends: 47 [2022-07-21 17:36:29,279 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 17:36:29,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:36:29,284 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:29,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 17:36:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-07-21 17:36:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-21 17:36:29,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2022-07-21 17:36:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:29,297 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-21 17:36:29,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-21 17:36:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:36:29,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:29,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:29,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:36:29,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2098238121, now seen corresponding path program 1 times [2022-07-21 17:36:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086881953] [2022-07-21 17:36:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:29,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086881953] [2022-07-21 17:36:29,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086881953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:29,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:29,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:36:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570039288] [2022-07-21 17:36:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:29,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:36:29,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:36:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:36:29,398 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:29,491 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-07-21 17:36:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:36:29,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:36:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:29,493 INFO L225 Difference]: With dead ends: 56 [2022-07-21 17:36:29,493 INFO L226 Difference]: Without dead ends: 56 [2022-07-21 17:36:29,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:36:29,494 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:29,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 25 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-21 17:36:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-07-21 17:36:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-21 17:36:29,499 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 7 [2022-07-21 17:36:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:29,500 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-21 17:36:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-21 17:36:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:36:29,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:29,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:29,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:36:29,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1884133396, now seen corresponding path program 1 times [2022-07-21 17:36:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:29,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497767306] [2022-07-21 17:36:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497767306] [2022-07-21 17:36:29,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497767306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:29,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:29,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:36:29,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862242384] [2022-07-21 17:36:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:36:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:36:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:36:29,561 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:29,605 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-07-21 17:36:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:36:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:36:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:29,606 INFO L225 Difference]: With dead ends: 53 [2022-07-21 17:36:29,606 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 17:36:29,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:36:29,613 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:29,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:36:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 17:36:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-07-21 17:36:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-07-21 17:36:29,619 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2022-07-21 17:36:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:29,620 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-07-21 17:36:29,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-07-21 17:36:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:36:29,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:29,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:29,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:36:29,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1721365971, now seen corresponding path program 1 times [2022-07-21 17:36:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896808017] [2022-07-21 17:36:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:29,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896808017] [2022-07-21 17:36:29,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896808017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:29,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:29,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:36:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670250670] [2022-07-21 17:36:29,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:29,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:36:29,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:36:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:36:29,711 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:29,828 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-07-21 17:36:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:36:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 17:36:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:29,830 INFO L225 Difference]: With dead ends: 85 [2022-07-21 17:36:29,831 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 17:36:29,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:36:29,833 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:29,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 17:36:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2022-07-21 17:36:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.375) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-21 17:36:29,841 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 13 [2022-07-21 17:36:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:29,841 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-21 17:36:29,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-21 17:36:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:36:29,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:29,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:29,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:36:29,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash 761251611, now seen corresponding path program 1 times [2022-07-21 17:36:29,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:29,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013772157] [2022-07-21 17:36:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:29,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:29,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:29,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013772157] [2022-07-21 17:36:29,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013772157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:29,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:29,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:36:29,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886235359] [2022-07-21 17:36:29,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:29,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:36:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:36:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:36:29,923 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:30,027 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-07-21 17:36:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:36:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:36:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:30,029 INFO L225 Difference]: With dead ends: 64 [2022-07-21 17:36:30,029 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 17:36:30,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:36:30,031 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:30,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 17:36:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-21 17:36:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.325) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-21 17:36:30,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2022-07-21 17:36:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:30,046 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-21 17:36:30,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-21 17:36:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:36:30,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:30,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:30,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 17:36:30,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash 761251612, now seen corresponding path program 1 times [2022-07-21 17:36:30,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520918407] [2022-07-21 17:36:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:30,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:30,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520918407] [2022-07-21 17:36:30,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520918407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:30,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:30,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:36:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72643729] [2022-07-21 17:36:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:30,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:36:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:36:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:36:30,141 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:30,304 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-07-21 17:36:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:36:30,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:36:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:30,305 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:36:30,306 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:36:30,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:36:30,307 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:30,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 111 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:36:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2022-07-21 17:36:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-07-21 17:36:30,315 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2022-07-21 17:36:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:30,316 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-07-21 17:36:30,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-07-21 17:36:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:36:30,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:30,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:30,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 17:36:30,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:30,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:30,318 INFO L85 PathProgramCache]: Analyzing trace with hash 700715683, now seen corresponding path program 1 times [2022-07-21 17:36:30,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:30,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862317328] [2022-07-21 17:36:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:30,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:30,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:36:30,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862317328] [2022-07-21 17:36:30,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862317328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:36:30,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050483390] [2022-07-21 17:36:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:30,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:36:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:36:30,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:36:30,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:36:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:36:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:30,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:36:30,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:36:30,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:36:30,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:36:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:30,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:36:30,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-07-21 17:36:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:36:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:36:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:30,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050483390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:36:30,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:36:30,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 16 [2022-07-21 17:36:30,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836684668] [2022-07-21 17:36:30,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:36:30,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:36:30,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:36:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:36:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:36:30,980 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:31,168 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-07-21 17:36:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:36:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 17:36:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:31,169 INFO L225 Difference]: With dead ends: 55 [2022-07-21 17:36:31,169 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:36:31,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:36:31,170 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:31,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 129 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-07-21 17:36:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:36:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-07-21 17:36:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-07-21 17:36:31,173 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 16 [2022-07-21 17:36:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:31,173 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-07-21 17:36:31,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-07-21 17:36:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:36:31,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:31,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:31,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:31,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:36:31,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash 247348413, now seen corresponding path program 1 times [2022-07-21 17:36:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:36:31,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460600550] [2022-07-21 17:36:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:36:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 17:36:31,407 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 17:36:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 17:36:31,426 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 17:36:31,426 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 17:36:31,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2022-07-21 17:36:31,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-07-21 17:36:31,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-07-21 17:36:31,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-07-21 17:36:31,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-07-21 17:36:31,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-07-21 17:36:31,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-07-21 17:36:31,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-07-21 17:36:31,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-07-21 17:36:31,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-07-21 17:36:31,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-07-21 17:36:31,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-07-21 17:36:31,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-07-21 17:36:31,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2022-07-21 17:36:31,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-07-21 17:36:31,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-07-21 17:36:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 17:36:31,433 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:31,435 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 17:36:31,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:36:31 BoogieIcfgContainer [2022-07-21 17:36:31,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 17:36:31,455 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 17:36:31,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 17:36:31,455 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 17:36:31,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:28" (3/4) ... [2022-07-21 17:36:31,458 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 17:36:31,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 17:36:31,458 INFO L158 Benchmark]: Toolchain (without parser) took 3570.04ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 33.7MB in the beginning and 50.3MB in the end (delta: -16.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2022-07-21 17:36:31,459 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:36:31,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 373.60ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 33.5MB in the beginning and 48.0MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 17:36:31,459 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.35ms. Allocated memory is still 71.3MB. Free memory was 48.0MB in the beginning and 46.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:36:31,460 INFO L158 Benchmark]: Boogie Preprocessor took 31.80ms. Allocated memory is still 71.3MB. Free memory was 46.1MB in the beginning and 44.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:36:31,460 INFO L158 Benchmark]: RCFGBuilder took 380.04ms. Allocated memory is still 71.3MB. Free memory was 44.6MB in the beginning and 49.2MB in the end (delta: -4.6MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-07-21 17:36:31,461 INFO L158 Benchmark]: TraceAbstraction took 2736.60ms. Allocated memory was 71.3MB in the beginning and 88.1MB in the end (delta: 16.8MB). Free memory was 48.7MB in the beginning and 50.3MB in the end (delta: -1.6MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2022-07-21 17:36:31,461 INFO L158 Benchmark]: Witness Printer took 3.12ms. Allocated memory is still 88.1MB. Free memory was 50.3MB in the beginning and 50.3MB in the end (delta: 38.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:36:31,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 373.60ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 33.5MB in the beginning and 48.0MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.35ms. Allocated memory is still 71.3MB. Free memory was 48.0MB in the beginning and 46.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.80ms. Allocated memory is still 71.3MB. Free memory was 46.1MB in the beginning and 44.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 380.04ms. Allocated memory is still 71.3MB. Free memory was 44.6MB in the beginning and 49.2MB in the end (delta: -4.6MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 2736.60ms. Allocated memory was 71.3MB in the beginning and 88.1MB in the end (delta: 16.8MB). Free memory was 48.7MB in the beginning and 50.3MB in the end (delta: -1.6MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Witness Printer took 3.12ms. Allocated memory is still 88.1MB. Free memory was 50.3MB in the beginning and 50.3MB in the end (delta: 38.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 46 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 475 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 475 mSDsluCounter, 558 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 342 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 578 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 216 mSDtfsCounter, 578 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=5, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 113 ConstructedInterpolants, 1 QuantifiedInterpolants, 873 SizeOfPredicates, 10 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-21 17:36:31,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-properties/simple-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:36:33,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:36:33,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:36:33,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:36:33,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:36:33,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:36:33,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:36:33,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:36:33,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:36:33,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:36:33,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:36:33,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:36:33,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:36:33,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:36:33,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:36:33,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:36:33,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:36:33,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:36:33,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:36:33,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:36:33,312 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:36:33,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:36:33,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:36:33,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:36:33,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:36:33,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:36:33,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:36:33,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:36:33,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:36:33,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:36:33,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:36:33,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:36:33,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:36:33,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:36:33,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:36:33,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:36:33,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:36:33,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:36:33,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:36:33,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:36:33,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:36:33,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:36:33,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:36:33,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:36:33,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:36:33,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:36:33,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:36:33,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:36:33,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:36:33,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:36:33,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:36:33,376 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:36:33,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:36:33,377 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:36:33,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:36:33,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:36:33,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:36:33,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:36:33,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:36:33,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:36:33,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:36:33,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:36:33,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:36:33,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:36:33,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:36:33,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:36:33,380 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:36:33,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:36:33,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:36:33,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:36:33,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:36:33,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:36:33,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:36:33,382 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:36:33,382 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:36:33,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:36:33,383 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2022-07-21 17:36:33,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:36:33,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:36:33,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:36:33,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:36:33,708 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:36:33,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2022-07-21 17:36:33,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ba4cf85/1b440c7a12574bf3897ae26bf741aade/FLAG5b9a3f5aa [2022-07-21 17:36:34,213 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:36:34,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2022-07-21 17:36:34,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ba4cf85/1b440c7a12574bf3897ae26bf741aade/FLAG5b9a3f5aa [2022-07-21 17:36:34,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ba4cf85/1b440c7a12574bf3897ae26bf741aade [2022-07-21 17:36:34,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:36:34,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:36:34,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:36:34,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:36:34,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:36:34,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:36:34" (1/1) ... [2022-07-21 17:36:34,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b74749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:34, skipping insertion in model container [2022-07-21 17:36:34,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:36:34" (1/1) ... [2022-07-21 17:36:34,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:36:34,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:36:34,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-21 17:36:34,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:36:34,940 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:36:34,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-21 17:36:34,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:36:35,024 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:36:35,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35 WrapperNode [2022-07-21 17:36:35,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:36:35,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:36:35,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:36:35,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:36:35,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,087 INFO L137 Inliner]: procedures = 127, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-21 17:36:35,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:36:35,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:36:35,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:36:35,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:36:35,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:36:35,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:36:35,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:36:35,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:36:35,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (1/1) ... [2022-07-21 17:36:35,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:36:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:36:35,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:36:35,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:36:35,215 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-21 17:36:35,216 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-21 17:36:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 17:36:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:36:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:36:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:36:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:36:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:36:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:36:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:36:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:36:35,315 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:36:35,316 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:36:35,376 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-21 17:36:35,578 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:36:35,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:36:35,584 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:36:35,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:35 BoogieIcfgContainer [2022-07-21 17:36:35,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:36:35,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:36:35,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:36:35,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:36:35,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:36:34" (1/3) ... [2022-07-21 17:36:35,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36316fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:36:35, skipping insertion in model container [2022-07-21 17:36:35,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:36:35" (2/3) ... [2022-07-21 17:36:35,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36316fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:36:35, skipping insertion in model container [2022-07-21 17:36:35,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:35" (3/3) ... [2022-07-21 17:36:35,592 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2022-07-21 17:36:35,602 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:36:35,603 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-07-21 17:36:35,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:36:35,640 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40ec9978, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d13754d [2022-07-21 17:36:35,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-21 17:36:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:36:35,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:35,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:36:35,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516511, now seen corresponding path program 1 times [2022-07-21 17:36:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:35,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380609061] [2022-07-21 17:36:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:35,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:35,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:35,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:35,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:36:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:36:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:35,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:36:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:35,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:36:35,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380609061] [2022-07-21 17:36:35,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380609061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:35,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:35,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:36:35,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883147009] [2022-07-21 17:36:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:35,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:36:35,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:36:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:36:35,911 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:36,132 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-07-21 17:36:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:36:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:36:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:36,139 INFO L225 Difference]: With dead ends: 74 [2022-07-21 17:36:36,139 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 17:36:36,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:36:36,144 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:36,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:36:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 17:36:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2022-07-21 17:36:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2022-07-21 17:36:36,176 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 6 [2022-07-21 17:36:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:36,177 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2022-07-21 17:36:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2022-07-21 17:36:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:36:36,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:36,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:36:36,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:36,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:36,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516510, now seen corresponding path program 1 times [2022-07-21 17:36:36,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:36,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754974633] [2022-07-21 17:36:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:36,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:36,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:36,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:36:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:36:36,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:36,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:36:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:36,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:36:36,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:36,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754974633] [2022-07-21 17:36:36,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754974633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:36,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:36,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:36:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11581788] [2022-07-21 17:36:36,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:36:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:36:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:36:36,467 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:36,568 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-21 17:36:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:36:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:36:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:36,570 INFO L225 Difference]: With dead ends: 49 [2022-07-21 17:36:36,570 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 17:36:36,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:36:36,571 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:36,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 17:36:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-07-21 17:36:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-21 17:36:36,576 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2022-07-21 17:36:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:36,576 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-21 17:36:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-21 17:36:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:36:36,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:36,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:36,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:36,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:36,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 417959389, now seen corresponding path program 1 times [2022-07-21 17:36:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:36,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315666646] [2022-07-21 17:36:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:36,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:36,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:36:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:36:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:36,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:36:36,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315666646] [2022-07-21 17:36:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315666646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:36,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:36,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:36:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807275263] [2022-07-21 17:36:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:36:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:36:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:36:36,857 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:36,954 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-21 17:36:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:36:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 17:36:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:36,955 INFO L225 Difference]: With dead ends: 51 [2022-07-21 17:36:36,955 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 17:36:36,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:36:36,957 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:36,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:36:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 17:36:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-07-21 17:36:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-07-21 17:36:36,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2022-07-21 17:36:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:36,962 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-07-21 17:36:36,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-07-21 17:36:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:36:36,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:36,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:36,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:37,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:37,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:37,175 INFO L85 PathProgramCache]: Analyzing trace with hash 71880067, now seen corresponding path program 1 times [2022-07-21 17:36:37,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:37,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848075926] [2022-07-21 17:36:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:37,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:37,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:36:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:36:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:37,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:36:37,331 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-21 17:36:37,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-21 17:36:37,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:36:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:37,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:36:37,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848075926] [2022-07-21 17:36:37,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848075926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:37,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:36:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160288230] [2022-07-21 17:36:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:36:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:36:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:36:37,364 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:37,585 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-07-21 17:36:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:36:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:36:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:37,586 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:36:37,586 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 17:36:37,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:36:37,588 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:37,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 91 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:36:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 17:36:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2022-07-21 17:36:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.394736842105263) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-21 17:36:37,593 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2022-07-21 17:36:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:37,593 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-21 17:36:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-21 17:36:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:36:37,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:37,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:37,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:37,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:37,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769707, now seen corresponding path program 1 times [2022-07-21 17:36:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799881817] [2022-07-21 17:36:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:37,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:37,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:37,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:37,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:36:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:36:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:37,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:36:37,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:36:37,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:36:37,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 17:36:37,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:36:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:37,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:36:37,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799881817] [2022-07-21 17:36:37,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799881817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:37,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:37,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:36:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410090675] [2022-07-21 17:36:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:37,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:36:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:36:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:36:37,972 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:38,281 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-07-21 17:36:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:36:38,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 17:36:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:38,283 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:36:38,283 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:36:38,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:36:38,284 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:38,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:36:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:36:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2022-07-21 17:36:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-21 17:36:38,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 13 [2022-07-21 17:36:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:38,288 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-21 17:36:38,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-21 17:36:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:36:38,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:38,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:38,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:38,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:38,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769708, now seen corresponding path program 1 times [2022-07-21 17:36:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:38,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022462335] [2022-07-21 17:36:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:38,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:38,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:36:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:36:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:38,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:36:38,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:36:38,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 17:36:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:38,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:36:38,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022462335] [2022-07-21 17:36:38,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022462335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:36:38,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:36:38,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:36:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169678358] [2022-07-21 17:36:38,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:36:38,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:36:38,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:36:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:36:38,601 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:38,782 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-07-21 17:36:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:36:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 17:36:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:38,784 INFO L225 Difference]: With dead ends: 54 [2022-07-21 17:36:38,784 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 17:36:38,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:36:38,785 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:38,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:36:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 17:36:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2022-07-21 17:36:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-07-21 17:36:38,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2022-07-21 17:36:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:38,789 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-07-21 17:36:38,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-07-21 17:36:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:36:38,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:38,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:38,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:38,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:38,990 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1804762195, now seen corresponding path program 1 times [2022-07-21 17:36:38,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:38,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414337469] [2022-07-21 17:36:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:38,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:36:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:36:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:36:39,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:36:39,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:36:39,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:36:39,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:36:39,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:36:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:39,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:36:39,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-07-21 17:36:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:36:39,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:36:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:36:39,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:36:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414337469] [2022-07-21 17:36:39,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414337469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:36:39,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:36:39,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 17:36:39,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091191691] [2022-07-21 17:36:39,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:36:39,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:36:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:36:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:36:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:36:39,265 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:36:40,864 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-07-21 17:36:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:36:40,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:36:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:36:40,865 INFO L225 Difference]: With dead ends: 53 [2022-07-21 17:36:40,865 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 17:36:40,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:36:40,866 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:36:40,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 79 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:36:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 17:36:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-07-21 17:36:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-21 17:36:40,872 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2022-07-21 17:36:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:36:40,872 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-21 17:36:40,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:36:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-21 17:36:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:36:40,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:36:40,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:40,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:41,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:41,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-21 17:36:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:36:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -113054509, now seen corresponding path program 1 times [2022-07-21 17:36:41,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:36:41,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959048681] [2022-07-21 17:36:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:36:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:36:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:36:41,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:36:41,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:36:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 17:36:41,137 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 17:36:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 17:36:41,180 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-21 17:36:41,180 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 17:36:41,181 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2022-07-21 17:36:41,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-07-21 17:36:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-07-21 17:36:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-07-21 17:36:41,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:36:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:36:41,387 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:36:41,390 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 17:36:41,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:36:41 BoogieIcfgContainer [2022-07-21 17:36:41,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 17:36:41,406 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 17:36:41,407 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 17:36:41,407 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 17:36:41,407 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:35" (3/4) ... [2022-07-21 17:36:41,409 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 17:36:41,409 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 17:36:41,410 INFO L158 Benchmark]: Toolchain (without parser) took 6837.16ms. Allocated memory was 48.2MB in the beginning and 73.4MB in the end (delta: 25.2MB). Free memory was 32.0MB in the beginning and 37.7MB in the end (delta: -5.6MB). Peak memory consumption was 20.5MB. Max. memory is 16.1GB. [2022-07-21 17:36:41,410 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.2MB in the beginning and 30.2MB in the end (delta: 31.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:36:41,410 INFO L158 Benchmark]: CACSL2BoogieTranslator took 452.67ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 31.9MB in the beginning and 37.3MB in the end (delta: -5.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 17:36:41,411 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.50ms. Allocated memory is still 60.8MB. Free memory was 37.3MB in the beginning and 35.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:36:41,411 INFO L158 Benchmark]: Boogie Preprocessor took 48.65ms. Allocated memory is still 60.8MB. Free memory was 35.4MB in the beginning and 33.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:36:41,411 INFO L158 Benchmark]: RCFGBuilder took 446.72ms. Allocated memory is still 60.8MB. Free memory was 33.9MB in the beginning and 33.6MB in the end (delta: 316.8kB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-07-21 17:36:41,411 INFO L158 Benchmark]: TraceAbstraction took 5819.38ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 33.1MB in the beginning and 38.2MB in the end (delta: -5.1MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-07-21 17:36:41,412 INFO L158 Benchmark]: Witness Printer took 2.89ms. Allocated memory is still 73.4MB. Free memory was 38.2MB in the beginning and 37.7MB in the end (delta: 475.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:36:41,413 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.2MB in the beginning and 30.2MB in the end (delta: 31.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 452.67ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 31.9MB in the beginning and 37.3MB in the end (delta: -5.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.50ms. Allocated memory is still 60.8MB. Free memory was 37.3MB in the beginning and 35.4MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.65ms. Allocated memory is still 60.8MB. Free memory was 35.4MB in the beginning and 33.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 446.72ms. Allocated memory is still 60.8MB. Free memory was 33.9MB in the beginning and 33.6MB in the end (delta: 316.8kB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5819.38ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 33.1MB in the beginning and 38.2MB in the end (delta: -5.1MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Witness Printer took 2.89ms. Allocated memory is still 73.4MB. Free memory was 38.2MB in the beginning and 37.7MB in the end (delta: 475.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={6:0}] [L534] List t; [L535] List p = a; VAL [a={6:0}, p={6:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={6:0}, p={6:0}] [L544] p->n = 0 VAL [a={6:0}, p={6:0}] [L545] p = a VAL [a={6:0}, p={6:0}] [L546] COND TRUE p!=0 VAL [a={6:0}, p={6:0}] [L547] EXPR p->h VAL [a={6:0}, p={6:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={6:0}, p={6:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={6:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={6:0}, p={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 367 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 367 mSDsluCounter, 444 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 277 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 527 IncrementalHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 167 mSDtfsCounter, 527 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=1, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 102 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 527 SizeOfPredicates, 31 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-21 17:36:41,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample