./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/memsafety-ext3/scopes3.c -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 f8b4bb9a8f404cd020a4d6119f922da096d098a1547934faf4c16f394bfab92c --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 07:11:45,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 07:11:45,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 07:11:45,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 07:11:45,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 07:11:45,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 07:11:45,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 07:11:45,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 07:11:45,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 07:11:45,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 07:11:45,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 07:11:45,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 07:11:45,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 07:11:45,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 07:11:45,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 07:11:45,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 07:11:45,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 07:11:45,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 07:11:45,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 07:11:45,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 07:11:45,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 07:11:45,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 07:11:45,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 07:11:45,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 07:11:45,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 07:11:45,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 07:11:45,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 07:11:45,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 07:11:45,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 07:11:45,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 07:11:45,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 07:11:45,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 07:11:45,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 07:11:45,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 07:11:45,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 07:11:45,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 07:11:45,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 07:11:45,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 07:11:45,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 07:11:45,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 07:11:45,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 07:11:45,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 07:11:45,740 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 07:11:45,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 07:11:45,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 07:11:45,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 07:11:45,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 07:11:45,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 07:11:45,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 07:11:45,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 07:11:45,742 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 07:11:45,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 07:11:45,742 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 07:11:45,742 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 07:11:45,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 07:11:45,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 07:11:45,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 07:11:45,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 07:11:45,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 07:11:45,745 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 07:11:45,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8b4bb9a8f404cd020a4d6119f922da096d098a1547934faf4c16f394bfab92c [2023-02-18 07:11:45,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 07:11:45,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 07:11:45,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 07:11:45,970 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 07:11:45,971 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 07:11:45,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes3.c [2023-02-18 07:11:47,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 07:11:47,173 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 07:11:47,173 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes3.c [2023-02-18 07:11:47,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d8297d98/f7d6eda8611549d2a0f3001dded8fbde/FLAG4b6db8c4e [2023-02-18 07:11:47,191 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d8297d98/f7d6eda8611549d2a0f3001dded8fbde [2023-02-18 07:11:47,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 07:11:47,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 07:11:47,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 07:11:47,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 07:11:47,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 07:11:47,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d02f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47, skipping insertion in model container [2023-02-18 07:11:47,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 07:11:47,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 07:11:47,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 07:11:47,357 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 07:11:47,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 07:11:47,378 INFO L208 MainTranslator]: Completed translation [2023-02-18 07:11:47,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47 WrapperNode [2023-02-18 07:11:47,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 07:11:47,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 07:11:47,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 07:11:47,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 07:11:47,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,402 INFO L138 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-02-18 07:11:47,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 07:11:47,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 07:11:47,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 07:11:47,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 07:11:47,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,423 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 07:11:47,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 07:11:47,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 07:11:47,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 07:11:47,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (1/1) ... [2023-02-18 07:11:47,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 07:11:47,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:11:47,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 07:11:47,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 07:11:47,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 07:11:47,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 07:11:47,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 07:11:47,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 07:11:47,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 07:11:47,535 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 07:11:47,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 07:11:47,665 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 07:11:47,669 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 07:11:47,671 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 07:11:47,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:11:47 BoogieIcfgContainer [2023-02-18 07:11:47,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 07:11:47,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 07:11:47,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 07:11:47,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 07:11:47,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 07:11:47" (1/3) ... [2023-02-18 07:11:47,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e95687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:11:47, skipping insertion in model container [2023-02-18 07:11:47,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:11:47" (2/3) ... [2023-02-18 07:11:47,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e95687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:11:47, skipping insertion in model container [2023-02-18 07:11:47,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:11:47" (3/3) ... [2023-02-18 07:11:47,680 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes3.c [2023-02-18 07:11:47,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 07:11:47,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-02-18 07:11:47,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 07:11:47,742 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;@99f2459, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 07:11:47,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-02-18 07:11:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 07:11:47,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:47,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 07:11:47,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash 925990, now seen corresponding path program 1 times [2023-02-18 07:11:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652637151] [2023-02-18 07:11:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:11:47,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652637151] [2023-02-18 07:11:47,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652637151] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:11:47,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:11:47,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 07:11:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708589743] [2023-02-18 07:11:47,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:11:47,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 07:11:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:11:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 07:11:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 07:11:47,881 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:11:47,901 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-02-18 07:11:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 07:11:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-18 07:11:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:11:47,909 INFO L225 Difference]: With dead ends: 15 [2023-02-18 07:11:47,909 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 07:11:47,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 07:11:47,915 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:11:47,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:11:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 07:11:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 07:11:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.625) internal successors, (13), 12 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) [2023-02-18 07:11:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-02-18 07:11:47,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2023-02-18 07:11:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:11:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-02-18 07:11:47,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-02-18 07:11:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 07:11:47,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:47,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 07:11:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 07:11:47,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2023-02-18 07:11:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733441956] [2023-02-18 07:11:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:47,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:11:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733441956] [2023-02-18 07:11:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733441956] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:11:47,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:11:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 07:11:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623812094] [2023-02-18 07:11:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:11:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 07:11:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:11:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 07:11:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 07:11:47,970 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:11:47,979 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2023-02-18 07:11:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 07:11:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-18 07:11:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:11:47,981 INFO L225 Difference]: With dead ends: 18 [2023-02-18 07:11:47,981 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 07:11:47,981 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 [2023-02-18 07:11:47,982 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:11:47,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:11:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 07:11:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2023-02-18 07:11:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-02-18 07:11:47,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2023-02-18 07:11:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:11:47,986 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-02-18 07:11:47,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-02-18 07:11:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 07:11:47,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:47,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 07:11:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 07:11:47,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-18 07:11:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891938049] [2023-02-18 07:11:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:11:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891938049] [2023-02-18 07:11:48,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891938049] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:11:48,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:11:48,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 07:11:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895709254] [2023-02-18 07:11:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:11:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 07:11:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:11:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 07:11:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 07:11:48,064 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:11:48,077 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2023-02-18 07:11:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 07:11:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-18 07:11:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:11:48,078 INFO L225 Difference]: With dead ends: 13 [2023-02-18 07:11:48,078 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 07:11:48,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 07:11:48,079 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:11:48,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:11:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 07:11:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 07:11:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 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) [2023-02-18 07:11:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-02-18 07:11:48,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2023-02-18 07:11:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:11:48,082 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-02-18 07:11:48,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-02-18 07:11:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 07:11:48,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:48,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 07:11:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 07:11:48,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-18 07:11:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:48,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923647209] [2023-02-18 07:11:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:11:48,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923647209] [2023-02-18 07:11:48,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923647209] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:11:48,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:11:48,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 07:11:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495982930] [2023-02-18 07:11:48,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:11:48,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 07:11:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:11:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 07:11:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 07:11:48,177 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:11:48,187 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2023-02-18 07:11:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 07:11:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-02-18 07:11:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:11:48,188 INFO L225 Difference]: With dead ends: 11 [2023-02-18 07:11:48,188 INFO L226 Difference]: Without dead ends: 11 [2023-02-18 07:11:48,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 07:11:48,190 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:11:48,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:11:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-18 07:11:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-18 07:11:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-02-18 07:11:48,192 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2023-02-18 07:11:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:11:48,193 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-02-18 07:11:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-02-18 07:11:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 07:11:48,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:48,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:11:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 07:11:48,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646231, now seen corresponding path program 1 times [2023-02-18 07:11:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575122774] [2023-02-18 07:11:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:11:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575122774] [2023-02-18 07:11:48,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575122774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:11:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169546025] [2023-02-18 07:11:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:11:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:11:48,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:11:48,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 07:11:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 07:11:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:11:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:11:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169546025] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:11:48,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:11:48,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 07:11:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994017412] [2023-02-18 07:11:48,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:11:48,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 07:11:48,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:11:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 07:11:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 07:11:48,338 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:11:48,377 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2023-02-18 07:11:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:11:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 07:11:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:11:48,381 INFO L225 Difference]: With dead ends: 20 [2023-02-18 07:11:48,381 INFO L226 Difference]: Without dead ends: 20 [2023-02-18 07:11:48,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 07:11:48,382 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:11:48,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:11:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-18 07:11:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-18 07:11:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2023-02-18 07:11:48,385 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2023-02-18 07:11:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:11:48,385 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2023-02-18 07:11:48,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2023-02-18 07:11:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 07:11:48,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:48,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-02-18 07:11:48,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 07:11:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:11:48,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -116849137, now seen corresponding path program 2 times [2023-02-18 07:11:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631776743] [2023-02-18 07:11:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:11:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:11:48,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631776743] [2023-02-18 07:11:48,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631776743] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:11:48,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369475846] [2023-02-18 07:11:48,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:11:48,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:11:48,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:11:48,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:11:48,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 07:11:48,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:11:48,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:11:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 07:11:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:11:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:11:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:11:48,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369475846] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:11:48,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:11:48,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 07:11:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492801154] [2023-02-18 07:11:48,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:11:48,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 07:11:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:11:48,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 07:11:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-18 07:11:48,941 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:11:48,996 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2023-02-18 07:11:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 07:11:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 07:11:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:11:48,997 INFO L225 Difference]: With dead ends: 38 [2023-02-18 07:11:48,998 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 07:11:48,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-18 07:11:48,999 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:11:48,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:11:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 07:11:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-18 07:11:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2023-02-18 07:11:49,003 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 16 [2023-02-18 07:11:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:11:49,004 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2023-02-18 07:11:49,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:11:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2023-02-18 07:11:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 07:11:49,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:11:49,005 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2023-02-18 07:11:49,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 07:11:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 07:11:49,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-02-18 07:11:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:11:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1565294351, now seen corresponding path program 3 times [2023-02-18 07:11:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:11:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404156222] [2023-02-18 07:11:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:11:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:11:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 07:11:49,255 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 07:11:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 07:11:49,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 07:11:49,315 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 07:11:49,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-02-18 07:11:49,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-02-18 07:11:49,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-02-18 07:11:49,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-02-18 07:11:49,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2023-02-18 07:11:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 07:11:49,321 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-02-18 07:11:49,324 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 07:11:49,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 07:11:49 BoogieIcfgContainer [2023-02-18 07:11:49,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 07:11:49,358 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 07:11:49,358 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 07:11:49,359 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 07:11:49,359 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:11:47" (3/4) ... [2023-02-18 07:11:49,360 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 07:11:49,390 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 07:11:49,391 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 07:11:49,391 INFO L158 Benchmark]: Toolchain (without parser) took 2197.09ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 118.5MB in the beginning and 131.5MB in the end (delta: -13.0MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2023-02-18 07:11:49,391 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 90.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 07:11:49,392 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.46ms. Allocated memory is still 159.4MB. Free memory was 118.1MB in the beginning and 128.0MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-18 07:11:49,392 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.47ms. Allocated memory is still 159.4MB. Free memory was 128.0MB in the beginning and 126.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 07:11:49,392 INFO L158 Benchmark]: Boogie Preprocessor took 21.66ms. Allocated memory is still 159.4MB. Free memory was 126.7MB in the beginning and 125.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 07:11:49,392 INFO L158 Benchmark]: RCFGBuilder took 246.95ms. Allocated memory is still 159.4MB. Free memory was 125.5MB in the beginning and 116.2MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 07:11:49,393 INFO L158 Benchmark]: TraceAbstraction took 1683.08ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 115.4MB in the beginning and 133.6MB in the end (delta: -18.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2023-02-18 07:11:49,393 INFO L158 Benchmark]: Witness Printer took 32.37ms. Allocated memory is still 192.9MB. Free memory was 133.6MB in the beginning and 131.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 07:11:49,394 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 90.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.46ms. Allocated memory is still 159.4MB. Free memory was 118.1MB in the beginning and 128.0MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.47ms. Allocated memory is still 159.4MB. Free memory was 128.0MB in the beginning and 126.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.66ms. Allocated memory is still 159.4MB. Free memory was 126.7MB in the beginning and 125.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 246.95ms. Allocated memory is still 159.4MB. Free memory was 125.5MB in the beginning and 116.2MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1683.08ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 115.4MB in the beginning and 133.6MB in the end (delta: -18.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * Witness Printer took 32.37ms. Allocated memory is still 192.9MB. Free memory was 133.6MB in the beginning and 131.5MB 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: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=0, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={4:0}, i=1, p={4:0}] [L6] p[0] = 1 VAL [a={4:0}, i=1, p={4:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={5:0}, i=2, p={5:0}] [L6] p[0] = 1 VAL [a={5:0}, i=2, p={5:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={6:0}, i=3, p={6:0}] [L6] p[0] = 1 VAL [a={6:0}, i=3, p={6:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={7:0}, i=4, p={7:0}] [L6] p[0] = 1 VAL [a={7:0}, i=4, p={7:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={8:0}, i=5, p={8:0}] [L6] p[0] = 1 VAL [a={8:0}, i=5, p={8:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={9:0}, i=6, p={9:0}] [L6] p[0] = 1 VAL [a={9:0}, i=6, p={9:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={10:0}, i=7, p={10:0}] [L6] p[0] = 1 VAL [a={10:0}, i=7, p={10:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={11:0}, i=8, p={11:0}] [L6] p[0] = 1 VAL [a={11:0}, i=8, p={11:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={2:0}, i=9, p={2:0}] [L6] p[0] = 1 VAL [a={2:0}, i=9, p={2:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={2:0}] [L8] p[0] = 2 - 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 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, 15 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 7, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 121 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59 IncrementalHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 57 mSDtfsCounter, 59 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=6, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 223 SizeOfPredicates, 2 NumberOfNonLiveVariables, 178 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 0/69 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! [2023-02-18 07:11:49,418 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)