./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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/termination-crafted/LexIndexValue-Pointer-3.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 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:06:22,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:06:22,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:06:22,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:06:22,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:06:22,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:06:22,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:06:22,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:06:22,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:06:22,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:06:22,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:06:22,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:06:22,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:06:22,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:06:22,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:06:22,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:06:22,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:06:22,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:06:22,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:06:22,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:06:22,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:06:22,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:06:22,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:06:22,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:06:22,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:06:22,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:06:22,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:06:22,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:06:22,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:06:22,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:06:22,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:06:22,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:06:22,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:06:22,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:06:22,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:06:22,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:06:22,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:06:22,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:06:22,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:06:22,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:06:22,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:06:22,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:06:22,538 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:06:22,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:06:22,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:06:22,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:06:22,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:06:22,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:06:22,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:06:22,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:06:22,540 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:06:22,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:06:22,540 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:06:22,540 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:06:22,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:06:22,542 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:06:22,542 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:06:22,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:06:22,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:06:22,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:06:22,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:06:22,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:06:22,558 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:06:22,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2023-02-16 03:06:22,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:06:22,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:06:22,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:06:22,753 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:06:22,753 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:06:22,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2023-02-16 03:06:23,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:06:23,902 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:06:23,903 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2023-02-16 03:06:23,910 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/708994548/b6528d623b964bf69189561fedca7394/FLAG846e28e55 [2023-02-16 03:06:23,928 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/708994548/b6528d623b964bf69189561fedca7394 [2023-02-16 03:06:23,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:06:23,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:06:23,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:06:23,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:06:23,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:06:23,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:06:23" (1/1) ... [2023-02-16 03:06:23,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2176a4a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:23, skipping insertion in model container [2023-02-16 03:06:23,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:06:23" (1/1) ... [2023-02-16 03:06:23,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:06:23,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:06:24,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:06:24,064 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:06:24,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:06:24,083 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:06:24,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24 WrapperNode [2023-02-16 03:06:24,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:06:24,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:06:24,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:06:24,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:06:24,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,103 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-02-16 03:06:24,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:06:24,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:06:24,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:06:24,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:06:24,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:06:24,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:06:24,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:06:24,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:06:24,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (1/1) ... [2023-02-16 03:06:24,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:06:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:24,139 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) [2023-02-16 03:06:24,145 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 [2023-02-16 03:06:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:06:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:06:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:06:24,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:06:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:06:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:06:24,222 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:06:24,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:06:24,390 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:06:24,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:06:24,404 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 03:06:24,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:06:24 BoogieIcfgContainer [2023-02-16 03:06:24,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:06:24,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:06:24,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:06:24,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:06:24,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:06:23" (1/3) ... [2023-02-16 03:06:24,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b493cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:06:24, skipping insertion in model container [2023-02-16 03:06:24,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:06:24" (2/3) ... [2023-02-16 03:06:24,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b493cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:06:24, skipping insertion in model container [2023-02-16 03:06:24,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:06:24" (3/3) ... [2023-02-16 03:06:24,421 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2023-02-16 03:06:24,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:06:24,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-02-16 03:06:24,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:06:24,485 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;@1783fd41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:06:24,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-02-16 03:06:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:06:24,493 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:24,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:06:24,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-16 03:06:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:24,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460458092] [2023-02-16 03:06:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:24,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460458092] [2023-02-16 03:06:24,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460458092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:24,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:06:24,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:06:24,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470149808] [2023-02-16 03:06:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:06:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:06:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:06:24,686 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 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) [2023-02-16 03:06:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:24,719 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-16 03:06:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:06:24,721 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 [2023-02-16 03:06:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:24,726 INFO L225 Difference]: With dead ends: 30 [2023-02-16 03:06:24,727 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 03:06:24,729 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 [2023-02-16 03:06:24,736 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:24,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 03:06:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-16 03:06:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-02-16 03:06:24,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2023-02-16 03:06:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:24,759 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-02-16 03:06:24,759 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) [2023-02-16 03:06:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-02-16 03:06:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:06:24,760 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:24,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:06:24,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:06:24,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-16 03:06:24,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:24,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737980403] [2023-02-16 03:06:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737980403] [2023-02-16 03:06:24,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737980403] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:24,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:06:24,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:06:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484320868] [2023-02-16 03:06:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:24,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:06:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:06:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:06:24,847 INFO L87 Difference]: Start difference. First operand 28 states and 30 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) [2023-02-16 03:06:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:24,896 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2023-02-16 03:06:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:06:24,897 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 [2023-02-16 03:06:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:24,898 INFO L225 Difference]: With dead ends: 32 [2023-02-16 03:06:24,899 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 03:06:24,899 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 [2023-02-16 03:06:24,900 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:24,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 03:06:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-16 03:06:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-02-16 03:06:24,904 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2023-02-16 03:06:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:24,905 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-02-16 03:06:24,905 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) [2023-02-16 03:06:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-02-16 03:06:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:06:24,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:24,906 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:06:24,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:24,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-16 03:06:24,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:24,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119112821] [2023-02-16 03:06:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:25,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119112821] [2023-02-16 03:06:25,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119112821] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:25,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810281770] [2023-02-16 03:06:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:25,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:25,041 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) [2023-02-16 03:06:25,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:06:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:06:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:25,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:06:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810281770] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:25,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:25,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-16 03:06:25,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043644786] [2023-02-16 03:06:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:06:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:06:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:06:25,281 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:25,412 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2023-02-16 03:06:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:06:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 03:06:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:25,413 INFO L225 Difference]: With dead ends: 84 [2023-02-16 03:06:25,413 INFO L226 Difference]: Without dead ends: 84 [2023-02-16 03:06:25,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:06:25,415 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:25,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 61 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:06:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-16 03:06:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 42. [2023-02-16 03:06:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.4375) internal successors, (46), 41 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) [2023-02-16 03:06:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-02-16 03:06:25,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2023-02-16 03:06:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:25,422 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-02-16 03:06:25,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-02-16 03:06:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:06:25,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:25,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 03:06:25,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:25,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:25,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash -4646107, now seen corresponding path program 1 times [2023-02-16 03:06:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:25,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82548699] [2023-02-16 03:06:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 03:06:25,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82548699] [2023-02-16 03:06:25,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82548699] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:25,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:06:25,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:06:25,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454639731] [2023-02-16 03:06:25,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:25,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:06:25,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:25,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:06:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:06:25,700 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:25,727 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-02-16 03:06:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:06:25,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 03:06:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:25,729 INFO L225 Difference]: With dead ends: 39 [2023-02-16 03:06:25,729 INFO L226 Difference]: Without dead ends: 39 [2023-02-16 03:06:25,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:06:25,734 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:25,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-16 03:06:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-16 03:06:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-02-16 03:06:25,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2023-02-16 03:06:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:25,744 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-02-16 03:06:25,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-02-16 03:06:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:06:25,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:25,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 03:06:25,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:06:25,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2023-02-16 03:06:25,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:25,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514124342] [2023-02-16 03:06:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:25,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514124342] [2023-02-16 03:06:25,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514124342] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:25,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107429075] [2023-02-16 03:06:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:25,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:25,795 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) [2023-02-16 03:06:25,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:06:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 03:06:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107429075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:25,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:25,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-16 03:06:25,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718016326] [2023-02-16 03:06:25,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:25,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:06:25,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:06:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:06:25,877 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2023-02-16 03:06:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:25,900 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-02-16 03:06:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:06:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 13 [2023-02-16 03:06:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:25,903 INFO L225 Difference]: With dead ends: 47 [2023-02-16 03:06:25,903 INFO L226 Difference]: Without dead ends: 47 [2023-02-16 03:06:25,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:06:25,904 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:25,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 109 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-16 03:06:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-16 03:06:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-02-16 03:06:25,912 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 13 [2023-02-16 03:06:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:25,912 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-02-16 03:06:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2023-02-16 03:06:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-02-16 03:06:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 03:06:25,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:25,913 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-16 03:06:25,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:26,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-16 03:06:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:26,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367994644] [2023-02-16 03:06:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:26,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:26,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367994644] [2023-02-16 03:06:26,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367994644] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:26,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241552444] [2023-02-16 03:06:26,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:26,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:26,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:26,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:06:26,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:06:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:06:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:26,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:06:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:26,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:06:26,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241552444] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:26,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:06:26,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-16 03:06:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244386225] [2023-02-16 03:06:26,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:26,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:06:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:06:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:06:26,586 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 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) [2023-02-16 03:06:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:26,636 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-16 03:06:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:06:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 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) Word has length 20 [2023-02-16 03:06:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:26,637 INFO L225 Difference]: With dead ends: 44 [2023-02-16 03:06:26,637 INFO L226 Difference]: Without dead ends: 44 [2023-02-16 03:06:26,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:06:26,638 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:26,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-16 03:06:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-16 03:06:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 43 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) [2023-02-16 03:06:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-16 03:06:26,640 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 20 [2023-02-16 03:06:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:26,640 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-16 03:06:26,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 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) [2023-02-16 03:06:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-16 03:06:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 03:06:26,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:26,641 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-02-16 03:06:26,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:26,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:26,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:26,846 INFO L85 PathProgramCache]: Analyzing trace with hash -807272550, now seen corresponding path program 2 times [2023-02-16 03:06:26,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:26,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914621151] [2023-02-16 03:06:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:26,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914621151] [2023-02-16 03:06:26,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914621151] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973905354] [2023-02-16 03:06:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:26,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:26,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:26,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:06:26,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:06:26,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:06:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:26,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:06:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:06:27,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:06:27,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973905354] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:27,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:06:27,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-02-16 03:06:27,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224357533] [2023-02-16 03:06:27,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:27,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:06:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:27,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:06:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:06:27,055 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2023-02-16 03:06:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:27,089 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2023-02-16 03:06:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:06:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 29 [2023-02-16 03:06:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:27,090 INFO L225 Difference]: With dead ends: 57 [2023-02-16 03:06:27,090 INFO L226 Difference]: Without dead ends: 57 [2023-02-16 03:06:27,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:06:27,093 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:27,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-16 03:06:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-02-16 03:06:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-02-16 03:06:27,104 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 29 [2023-02-16 03:06:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:27,105 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-02-16 03:06:27,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2023-02-16 03:06:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-02-16 03:06:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 03:06:27,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:27,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:27,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:27,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:27,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674464, now seen corresponding path program 1 times [2023-02-16 03:06:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863345922] [2023-02-16 03:06:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:27,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863345922] [2023-02-16 03:06:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863345922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404016805] [2023-02-16 03:06:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:27,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:27,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:27,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:27,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:06:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:06:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:27,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:27,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404016805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:27,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:27,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-16 03:06:27,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792247615] [2023-02-16 03:06:27,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:27,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:06:27,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:06:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:06:27,535 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:27,591 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2023-02-16 03:06:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:06:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-16 03:06:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:27,594 INFO L225 Difference]: With dead ends: 83 [2023-02-16 03:06:27,594 INFO L226 Difference]: Without dead ends: 83 [2023-02-16 03:06:27,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:06:27,596 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:27,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 92 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-16 03:06:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-02-16 03:06:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 82 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-02-16 03:06:27,603 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 32 [2023-02-16 03:06:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:27,603 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-02-16 03:06:27,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-02-16 03:06:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-16 03:06:27,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:27,607 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:27,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:27,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:27,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1299913720, now seen corresponding path program 2 times [2023-02-16 03:06:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:27,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912638712] [2023-02-16 03:06:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:27,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:28,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912638712] [2023-02-16 03:06:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912638712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382747973] [2023-02-16 03:06:28,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:28,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:28,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:28,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:28,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:06:28,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:06:28,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:06:28,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:28,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:28,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382747973] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:28,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:28,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-16 03:06:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148627151] [2023-02-16 03:06:28,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:28,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:06:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:28,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:06:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:06:28,472 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:28,569 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2023-02-16 03:06:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 03:06:28,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 0 states have call successors, (0), 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 64 [2023-02-16 03:06:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:28,571 INFO L225 Difference]: With dead ends: 147 [2023-02-16 03:06:28,571 INFO L226 Difference]: Without dead ends: 147 [2023-02-16 03:06:28,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:06:28,572 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:28,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 89 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:06:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-16 03:06:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-16 03:06:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0633802816901408) internal successors, (151), 146 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2023-02-16 03:06:28,575 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 64 [2023-02-16 03:06:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:28,575 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2023-02-16 03:06:28,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2023-02-16 03:06:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-16 03:06:28,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:28,576 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:28,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:28,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash -101201880, now seen corresponding path program 3 times [2023-02-16 03:06:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063386929] [2023-02-16 03:06:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:06:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063386929] [2023-02-16 03:06:29,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063386929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21115550] [2023-02-16 03:06:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:06:29,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:29,557 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:29,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:06:29,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:06:29,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 03:06:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:29,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:06:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-02-16 03:06:29,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-02-16 03:06:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21115550] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:30,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:30,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 5, 5] total 41 [2023-02-16 03:06:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418003262] [2023-02-16 03:06:30,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 03:06:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 03:06:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 03:06:30,290 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 41 states, 41 states have (on average 3.658536585365854) internal successors, (150), 41 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:31,095 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2023-02-16 03:06:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-16 03:06:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.658536585365854) internal successors, (150), 41 states have internal predecessors, (150), 0 states have call successors, (0), 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 128 [2023-02-16 03:06:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:31,097 INFO L225 Difference]: With dead ends: 186 [2023-02-16 03:06:31,097 INFO L226 Difference]: Without dead ends: 186 [2023-02-16 03:06:31,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1680, Invalid=4172, Unknown=0, NotChecked=0, Total=5852 [2023-02-16 03:06:31,099 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:31,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 110 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:06:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-16 03:06:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2023-02-16 03:06:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.0683229813664596) internal successors, (172), 163 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2023-02-16 03:06:31,102 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 128 [2023-02-16 03:06:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:31,102 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2023-02-16 03:06:31,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.658536585365854) internal successors, (150), 41 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2023-02-16 03:06:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-16 03:06:31,103 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:31,103 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:31,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:31,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:31,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash -373807950, now seen corresponding path program 1 times [2023-02-16 03:06:31,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:31,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813840828] [2023-02-16 03:06:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:31,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2023-02-16 03:06:31,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813840828] [2023-02-16 03:06:31,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813840828] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:31,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:06:31,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:06:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687398340] [2023-02-16 03:06:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:06:31,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:06:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:06:31,368 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:31,373 INFO L93 Difference]: Finished difference Result 163 states and 171 transitions. [2023-02-16 03:06:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:06:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-02-16 03:06:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:31,375 INFO L225 Difference]: With dead ends: 163 [2023-02-16 03:06:31,375 INFO L226 Difference]: Without dead ends: 163 [2023-02-16 03:06:31,375 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 [2023-02-16 03:06:31,376 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 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 [2023-02-16 03:06:31,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:06:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-16 03:06:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-02-16 03:06:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.062111801242236) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2023-02-16 03:06:31,379 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 132 [2023-02-16 03:06:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:31,379 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2023-02-16 03:06:31,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2023-02-16 03:06:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-16 03:06:31,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:31,380 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:31,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:06:31,381 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1547815637, now seen corresponding path program 1 times [2023-02-16 03:06:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:31,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420609483] [2023-02-16 03:06:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:31,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:32,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420609483] [2023-02-16 03:06:32,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420609483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070005768] [2023-02-16 03:06:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:32,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:32,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:32,191 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:32,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:06:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:06:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:32,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:33,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070005768] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:33,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:33,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2023-02-16 03:06:33,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646302269] [2023-02-16 03:06:33,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:33,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-16 03:06:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-16 03:06:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:06:33,527 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:33,725 INFO L93 Difference]: Finished difference Result 295 states and 303 transitions. [2023-02-16 03:06:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-16 03:06:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 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 134 [2023-02-16 03:06:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:33,727 INFO L225 Difference]: With dead ends: 295 [2023-02-16 03:06:33,727 INFO L226 Difference]: Without dead ends: 295 [2023-02-16 03:06:33,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:06:33,728 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:33,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 195 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:06:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-02-16 03:06:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-02-16 03:06:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.0341296928327646) internal successors, (303), 294 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 303 transitions. [2023-02-16 03:06:33,732 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 303 transitions. Word has length 134 [2023-02-16 03:06:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:33,732 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 303 transitions. [2023-02-16 03:06:33,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 303 transitions. [2023-02-16 03:06:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-16 03:06:33,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:33,734 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:33,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 03:06:33,940 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 965033720, now seen corresponding path program 2 times [2023-02-16 03:06:33,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:33,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518981256] [2023-02-16 03:06:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:33,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:36,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:36,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518981256] [2023-02-16 03:06:36,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518981256] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074967567] [2023-02-16 03:06:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:36,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:36,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:06:36,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:06:36,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:36,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:06:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:37,295 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~p~0#1.base| Int)) (and (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base|)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base| 0)))) is different from true [2023-02-16 03:06:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-02-16 03:06:37,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:06:37,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074967567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:06:37,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:06:37,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2023-02-16 03:06:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913337944] [2023-02-16 03:06:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:06:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:06:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:06:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-16 03:06:37,300 INFO L87 Difference]: Start difference. First operand 295 states and 303 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2023-02-16 03:06:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:37,359 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2023-02-16 03:06:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:06:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2023-02-16 03:06:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:37,360 INFO L225 Difference]: With dead ends: 294 [2023-02-16 03:06:37,361 INFO L226 Difference]: Without dead ends: 290 [2023-02-16 03:06:37,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2218, Invalid=2477, Unknown=1, NotChecked=134, Total=4830 [2023-02-16 03:06:37,364 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:37,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2023-02-16 03:06:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-02-16 03:06:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-02-16 03:06:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0207612456747406) internal successors, (295), 289 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 295 transitions. [2023-02-16 03:06:37,367 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 295 transitions. Word has length 266 [2023-02-16 03:06:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:37,368 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 295 transitions. [2023-02-16 03:06:37,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2023-02-16 03:06:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 295 transitions. [2023-02-16 03:06:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-02-16 03:06:37,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:37,370 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-16 03:06:37,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:37,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 03:06:37,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:06:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1316770476, now seen corresponding path program 4 times [2023-02-16 03:06:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:37,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417320500] [2023-02-16 03:06:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8150 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 03:06:39,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417320500] [2023-02-16 03:06:39,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417320500] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557567486] [2023-02-16 03:06:39,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:06:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:39,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:39,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:07:01,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:07:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:07:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-16 03:07:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:07:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8150 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 03:07:02,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:07:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8150 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 03:07:06,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557567486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:07:06,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:07:06,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-16 03:07:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100760358] [2023-02-16 03:07:06,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:07:06,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-16 03:07:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:07:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-16 03:07:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 03:07:06,078 INFO L87 Difference]: Start difference. First operand 290 states and 295 transitions. Second operand has 133 states, 133 states have (on average 3.962406015037594) internal successors, (527), 133 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:07:06,587 INFO L93 Difference]: Finished difference Result 554 states and 559 transitions. [2023-02-16 03:07:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-02-16 03:07:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.962406015037594) internal successors, (527), 133 states have internal predecessors, (527), 0 states have call successors, (0), 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 273 [2023-02-16 03:07:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:07:06,590 INFO L225 Difference]: With dead ends: 554 [2023-02-16 03:07:06,590 INFO L226 Difference]: Without dead ends: 554 [2023-02-16 03:07:06,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 03:07:06,595 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:07:06,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 177 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:07:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-02-16 03:07:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2023-02-16 03:07:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.0108499095840868) internal successors, (559), 553 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 559 transitions. [2023-02-16 03:07:06,611 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 559 transitions. Word has length 273 [2023-02-16 03:07:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:07:06,611 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 559 transitions. [2023-02-16 03:07:06,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.962406015037594) internal successors, (527), 133 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 559 transitions. [2023-02-16 03:07:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2023-02-16 03:07:06,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:07:06,618 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-16 03:07:06,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:07:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-16 03:07:06,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-16 03:07:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:07:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1392700454, now seen corresponding path program 5 times [2023-02-16 03:07:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:07:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785334400] [2023-02-16 03:07:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:07:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 33692 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 03:07:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:07:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785334400] [2023-02-16 03:07:16,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785334400] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:07:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893406234] [2023-02-16 03:07:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 03:07:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:07:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:07:16,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:07:16,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process