./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.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 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:09:41,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:09:41,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:09:41,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:09:41,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:09:41,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:09:41,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:09:41,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:09:41,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:09:41,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:09:41,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:09:41,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:09:41,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:09:41,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:09:41,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:09:41,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:09:41,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:09:41,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:09:41,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:09:41,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:09:41,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:09:41,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:09:41,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:09:41,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:09:41,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:09:41,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:09:41,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:09:41,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:09:41,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:09:41,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:09:41,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:09:41,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:09:41,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:09:41,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:09:41,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:09:41,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:09:41,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:09:41,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:09:41,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:09:41,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:09:41,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:09:41,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:09:41,464 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:09:41,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:09:41,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:09:41,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:09:41,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:09:41,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:09:41,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:09:41,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:09:41,468 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:09:41,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:09:41,469 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:09:41,469 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:09:41,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:09:41,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:09:41,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:09:41,470 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:09:41,470 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:09:41,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:09:41,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:09:41,471 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:09:41,471 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:09:41,471 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:09:41,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:09:41,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:09:41,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:09:41,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:09:41,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:09:41,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:09:41,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:09:41,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:09:41,473 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:09:41,473 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:09:41,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:09:41,474 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:09:41,474 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10a3b461143c2c5d394f7bd34cd6fefed4195b79a5252178f7ede404a303cf96 [2023-02-17 08:09:41,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:09:41,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:09:41,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:09:41,735 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:09:41,735 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:09:41,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2023-02-17 08:09:42,935 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:09:43,224 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:09:43,224 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2023-02-17 08:09:43,235 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/169e5318a/c0ffbcdacb784a308a0fce8d0a54bbca/FLAGf237676a3 [2023-02-17 08:09:43,246 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/169e5318a/c0ffbcdacb784a308a0fce8d0a54bbca [2023-02-17 08:09:43,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:09:43,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:09:43,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:09:43,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:09:43,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:09:43,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7a70bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43, skipping insertion in model container [2023-02-17 08:09:43,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:09:43,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:09:43,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:09:43,589 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:09:43,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:09:43,645 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:09:43,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43 WrapperNode [2023-02-17 08:09:43,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:09:43,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:09:43,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:09:43,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:09:43,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,681 INFO L138 Inliner]: procedures = 118, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-02-17 08:09:43,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:09:43,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:09:43,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:09:43,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:09:43,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,701 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:09:43,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:09:43,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:09:43,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:09:43,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (1/1) ... [2023-02-17 08:09:43,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:09:43,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:43,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 08:09:43,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 08:09:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 08:09:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 08:09:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:09:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:09:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:09:43,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:09:43,899 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:09:43,901 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:09:44,121 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:09:44,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:09:44,127 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 08:09:44,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:09:44 BoogieIcfgContainer [2023-02-17 08:09:44,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:09:44,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:09:44,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:09:44,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:09:44,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:09:43" (1/3) ... [2023-02-17 08:09:44,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b53dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:09:44, skipping insertion in model container [2023-02-17 08:09:44,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:09:43" (2/3) ... [2023-02-17 08:09:44,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b53dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:09:44, skipping insertion in model container [2023-02-17 08:09:44,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:09:44" (3/3) ... [2023-02-17 08:09:44,141 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2023-02-17 08:09:44,165 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:09:44,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-02-17 08:09:44,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:09:44,219 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51d6a5c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:09:44,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-02-17 08:09:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 43 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) [2023-02-17 08:09:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:09:44,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:44,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:09:44,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2023-02-17 08:09:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:44,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305439541] [2023-02-17 08:09:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305439541] [2023-02-17 08:09:44,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305439541] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:44,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:44,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:44,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471659379] [2023-02-17 08:09:44,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:09:44,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:09:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:44,510 INFO L87 Difference]: Start difference. First operand has 44 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 43 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:44,568 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2023-02-17 08:09:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:09:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 08:09:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:44,578 INFO L225 Difference]: With dead ends: 80 [2023-02-17 08:09:44,581 INFO L226 Difference]: Without dead ends: 76 [2023-02-17 08:09:44,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:44,587 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 72 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:44,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 82 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-17 08:09:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 44. [2023-02-17 08:09:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 43 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) [2023-02-17 08:09:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-02-17 08:09:44,622 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 6 [2023-02-17 08:09:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:44,623 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-02-17 08:09:44,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-02-17 08:09:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:09:44,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:44,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:09:44,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:09:44,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2023-02-17 08:09:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:44,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081048656] [2023-02-17 08:09:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:44,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081048656] [2023-02-17 08:09:44,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081048656] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:44,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:44,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331255181] [2023-02-17 08:09:44,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:44,843 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:44,989 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-02-17 08:09:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 08:09:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:44,993 INFO L225 Difference]: With dead ends: 73 [2023-02-17 08:09:44,994 INFO L226 Difference]: Without dead ends: 73 [2023-02-17 08:09:44,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:09:44,999 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:44,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-17 08:09:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 42. [2023-02-17 08:09:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-02-17 08:09:45,012 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 6 [2023-02-17 08:09:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,013 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-02-17 08:09:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-02-17 08:09:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:09:45,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:09:45,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2023-02-17 08:09:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911342398] [2023-02-17 08:09:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911342398] [2023-02-17 08:09:45,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911342398] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:45,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:45,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:09:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007876258] [2023-02-17 08:09:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:09:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:09:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:45,179 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,253 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2023-02-17 08:09:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:09:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 08:09:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,256 INFO L225 Difference]: With dead ends: 72 [2023-02-17 08:09:45,256 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 08:09:45,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:09:45,262 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 66 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 08:09:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2023-02-17 08:09:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.5862068965517242) 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) [2023-02-17 08:09:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-02-17 08:09:45,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 6 [2023-02-17 08:09:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,272 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-02-17 08:09:45,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-02-17 08:09:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:09:45,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:09:45,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2023-02-17 08:09:45,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492653075] [2023-02-17 08:09:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492653075] [2023-02-17 08:09:45,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492653075] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:45,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:45,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926430120] [2023-02-17 08:09:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:45,363 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,446 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-02-17 08:09:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 08:09:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,449 INFO L225 Difference]: With dead ends: 78 [2023-02-17 08:09:45,451 INFO L226 Difference]: Without dead ends: 78 [2023-02-17 08:09:45,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:09:45,456 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-17 08:09:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2023-02-17 08:09:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 44 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) [2023-02-17 08:09:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-02-17 08:09:45,469 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 6 [2023-02-17 08:09:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,469 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-02-17 08:09:45,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-02-17 08:09:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:09:45,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:09:45,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,477 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2023-02-17 08:09:45,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068953220] [2023-02-17 08:09:45,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068953220] [2023-02-17 08:09:45,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068953220] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:45,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:45,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558570082] [2023-02-17 08:09:45,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:45,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:45,529 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,558 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-17 08:09:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 08:09:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,559 INFO L225 Difference]: With dead ends: 44 [2023-02-17 08:09:45,559 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 08:09:45,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:45,560 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 08:09:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-02-17 08:09:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 42 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) [2023-02-17 08:09:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-02-17 08:09:45,564 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 6 [2023-02-17 08:09:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,568 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-02-17 08:09:45,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-02-17 08:09:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 08:09:45,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:09:45,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,571 INFO L85 PathProgramCache]: Analyzing trace with hash -590959631, now seen corresponding path program 1 times [2023-02-17 08:09:45,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343842827] [2023-02-17 08:09:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343842827] [2023-02-17 08:09:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343842827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:45,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:45,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:09:45,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472106988] [2023-02-17 08:09:45,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:09:45,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:09:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:09:45,655 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,697 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-02-17 08:09:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:09:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-17 08:09:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,698 INFO L225 Difference]: With dead ends: 40 [2023-02-17 08:09:45,699 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 08:09:45,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:09:45,700 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 08:09:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-02-17 08:09:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 39 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) [2023-02-17 08:09:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-02-17 08:09:45,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2023-02-17 08:09:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,703 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-02-17 08:09:45,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-02-17 08:09:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 08:09:45,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 08:09:45,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash -590959630, now seen corresponding path program 1 times [2023-02-17 08:09:45,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931584296] [2023-02-17 08:09:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931584296] [2023-02-17 08:09:45,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931584296] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:45,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:45,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:09:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342503249] [2023-02-17 08:09:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:09:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:09:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:09:45,803 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:45,867 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-02-17 08:09:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:09:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-17 08:09:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:45,868 INFO L225 Difference]: With dead ends: 62 [2023-02-17 08:09:45,868 INFO L226 Difference]: Without dead ends: 62 [2023-02-17 08:09:45,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:09:45,869 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 233 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:45,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 51 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-17 08:09:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2023-02-17 08:09:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 46 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) [2023-02-17 08:09:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-02-17 08:09:45,875 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 9 [2023-02-17 08:09:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:45,875 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-02-17 08:09:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-02-17 08:09:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 08:09:45,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:45,876 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:45,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 08:09:45,877 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2023-02-17 08:09:45,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396316957] [2023-02-17 08:09:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:45,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:45,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396316957] [2023-02-17 08:09:45,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396316957] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:09:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721397688] [2023-02-17 08:09:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:45,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:45,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:09:45,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:09:46,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:09:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 08:09:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:09:46,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-17 08:09:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:46,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:09:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721397688] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:09:46,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:09:46,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-17 08:09:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707462258] [2023-02-17 08:09:46,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:09:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 08:09:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 08:09:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-17 08:09:46,378 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:46,572 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2023-02-17 08:09:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:09:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 08:09:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:46,573 INFO L225 Difference]: With dead ends: 117 [2023-02-17 08:09:46,574 INFO L226 Difference]: Without dead ends: 117 [2023-02-17 08:09:46,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:09:46,576 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 328 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:46,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 246 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-17 08:09:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 44. [2023-02-17 08:09:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.4) internal successors, (49), 43 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) [2023-02-17 08:09:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-02-17 08:09:46,581 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 10 [2023-02-17 08:09:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:46,581 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-02-17 08:09:46,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-02-17 08:09:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 08:09:46,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:46,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:46,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 08:09:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:09:46,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:46,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2134761079, now seen corresponding path program 1 times [2023-02-17 08:09:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:46,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466962816] [2023-02-17 08:09:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:46,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466962816] [2023-02-17 08:09:46,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466962816] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:46,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:46,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:09:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164444823] [2023-02-17 08:09:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:09:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:09:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:09:46,812 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:46,819 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-02-17 08:09:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:09:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 08:09:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:46,821 INFO L225 Difference]: With dead ends: 46 [2023-02-17 08:09:46,821 INFO L226 Difference]: Without dead ends: 46 [2023-02-17 08:09:46,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:09:46,823 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:46,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:09:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-17 08:09:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-17 08:09:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 45 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) [2023-02-17 08:09:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-17 08:09:46,836 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 13 [2023-02-17 08:09:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:46,836 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-17 08:09:46,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-17 08:09:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 08:09:46,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:46,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:46,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 08:09:46,838 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1483111174, now seen corresponding path program 1 times [2023-02-17 08:09:46,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:46,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322856956] [2023-02-17 08:09:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322856956] [2023-02-17 08:09:46,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322856956] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:46,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:46,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 08:09:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633063696] [2023-02-17 08:09:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:46,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:09:46,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:09:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:09:46,970 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:47,064 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-02-17 08:09:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:09:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 08:09:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:47,065 INFO L225 Difference]: With dead ends: 68 [2023-02-17 08:09:47,065 INFO L226 Difference]: Without dead ends: 68 [2023-02-17 08:09:47,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:09:47,066 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:47,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 180 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-17 08:09:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2023-02-17 08:09:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2023-02-17 08:09:47,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 15 [2023-02-17 08:09:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:47,070 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2023-02-17 08:09:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2023-02-17 08:09:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 08:09:47,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:47,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:47,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 08:09:47,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash 896305160, now seen corresponding path program 1 times [2023-02-17 08:09:47,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:47,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831624577] [2023-02-17 08:09:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:47,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:09:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:09:47,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:09:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831624577] [2023-02-17 08:09:47,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831624577] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:09:47,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:09:47,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 08:09:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650875717] [2023-02-17 08:09:47,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:09:47,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:09:47,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:09:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:09:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:09:47,290 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:09:47,416 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-02-17 08:09:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:09:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 08:09:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:09:47,418 INFO L225 Difference]: With dead ends: 78 [2023-02-17 08:09:47,418 INFO L226 Difference]: Without dead ends: 78 [2023-02-17 08:09:47,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:09:47,419 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:09:47,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 189 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:09:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-17 08:09:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2023-02-17 08:09:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-02-17 08:09:47,422 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2023-02-17 08:09:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:09:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-02-17 08:09:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:09:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-02-17 08:09:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 08:09:47,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:09:47,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:47,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 08:09:47,424 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-02-17 08:09:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:09:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1087742207, now seen corresponding path program 1 times [2023-02-17 08:09:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:09:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149790142] [2023-02-17 08:09:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:09:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:09:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 08:09:47,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 08:09:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 08:09:47,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 08:09:47,469 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 08:09:47,470 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-02-17 08:09:47,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-02-17 08:09:47,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-02-17 08:09:47,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-02-17 08:09:47,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-02-17 08:09:47,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-02-17 08:09:47,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-02-17 08:09:47,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-02-17 08:09:47,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-02-17 08:09:47,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-02-17 08:09:47,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-02-17 08:09:47,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-02-17 08:09:47,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (3 of 16 remaining) [2023-02-17 08:09:47,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (2 of 16 remaining) [2023-02-17 08:09:47,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (1 of 16 remaining) [2023-02-17 08:09:47,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2023-02-17 08:09:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 08:09:47,478 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:09:47,482 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 08:09:47,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 08:09:47 BoogieIcfgContainer [2023-02-17 08:09:47,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 08:09:47,526 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 08:09:47,526 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 08:09:47,526 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 08:09:47,527 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:09:44" (3/4) ... [2023-02-17 08:09:47,528 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 08:09:47,566 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 08:09:47,567 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 08:09:47,567 INFO L158 Benchmark]: Toolchain (without parser) took 4318.61ms. Allocated memory was 186.6MB in the beginning and 241.2MB in the end (delta: 54.5MB). Free memory was 156.6MB in the beginning and 156.9MB in the end (delta: -293.2kB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,567 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 08:09:47,568 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.01ms. Allocated memory is still 186.6MB. Free memory was 156.0MB in the beginning and 140.4MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,568 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.80ms. Allocated memory is still 186.6MB. Free memory was 140.4MB in the beginning and 137.2MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,568 INFO L158 Benchmark]: Boogie Preprocessor took 21.06ms. Allocated memory is still 186.6MB. Free memory was 137.2MB in the beginning and 135.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,569 INFO L158 Benchmark]: RCFGBuilder took 424.60ms. Allocated memory is still 186.6MB. Free memory was 135.7MB in the beginning and 123.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,569 INFO L158 Benchmark]: TraceAbstraction took 3394.83ms. Allocated memory was 186.6MB in the beginning and 241.2MB in the end (delta: 54.5MB). Free memory was 122.5MB in the beginning and 159.0MB in the end (delta: -36.5MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,570 INFO L158 Benchmark]: Witness Printer took 40.93ms. Allocated memory is still 241.2MB. Free memory was 159.0MB in the beginning and 156.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 08:09:47,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.01ms. Allocated memory is still 186.6MB. Free memory was 156.0MB in the beginning and 140.4MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.80ms. Allocated memory is still 186.6MB. Free memory was 140.4MB in the beginning and 137.2MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.06ms. Allocated memory is still 186.6MB. Free memory was 137.2MB in the beginning and 135.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 424.60ms. Allocated memory is still 186.6MB. Free memory was 135.7MB in the beginning and 123.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3394.83ms. Allocated memory was 186.6MB in the beginning and 241.2MB in the end (delta: 54.5MB). Free memory was 122.5MB in the beginning and 159.0MB in the end (delta: -36.5MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Witness Printer took 40.93ms. Allocated memory is still 241.2MB. Free memory was 159.0MB in the beginning and 156.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L536] RET, EXPR build_nondet_String() [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) [L531] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) - 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: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 3.3s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1348 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1348 mSDsluCounter, 1085 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 748 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 660 IncrementalHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 337 mSDtfsCounter, 660 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=11, InterpolantAutomatonStates: 67, 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, 11 MinimizatonAttempts, 255 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 1488 SizeOfPredicates, 1 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 10 PerfectInterpolantSequences, 4/9 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 proved your program to be incorrect! [2023-02-17 08:09:47,608 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)