./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_24-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-examples/sanfoundry_24-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 20:09:05,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 20:09:05,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 20:09:06,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 20:09:06,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 20:09:06,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 20:09:06,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 20:09:06,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 20:09:06,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 20:09:06,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 20:09:06,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 20:09:06,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 20:09:06,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 20:09:06,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 20:09:06,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 20:09:06,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 20:09:06,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 20:09:06,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 20:09:06,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 20:09:06,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 20:09:06,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 20:09:06,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 20:09:06,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 20:09:06,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 20:09:06,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 20:09:06,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 20:09:06,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 20:09:06,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 20:09:06,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 20:09:06,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 20:09:06,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 20:09:06,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 20:09:06,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 20:09:06,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 20:09:06,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 20:09:06,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 20:09:06,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 20:09:06,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 20:09:06,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 20:09:06,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 20:09:06,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 20:09:06,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 20:09:06,102 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 20:09:06,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 20:09:06,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 20:09:06,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 20:09:06,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 20:09:06,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 20:09:06,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 20:09:06,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 20:09:06,104 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 20:09:06,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 20:09:06,105 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 20:09:06,105 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 20:09:06,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 20:09:06,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 20:09:06,106 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 20:09:06,107 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 20:09:06,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 20:09:06,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 20:09:06,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 20:09:06,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:09:06,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 20:09:06,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 20:09:06,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 20:09:06,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 20:09:06,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 20:09:06,108 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 20:09:06,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 20:09:06,109 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 20:09:06,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2023-02-18 20:09:06,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 20:09:06,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 20:09:06,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 20:09:06,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 20:09:06,344 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 20:09:06,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2023-02-18 20:09:07,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 20:09:07,468 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 20:09:07,469 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2023-02-18 20:09:07,473 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53822d8d/c97d8064d5d94df7abdf741575e0f18a/FLAG448938bb1 [2023-02-18 20:09:07,482 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53822d8d/c97d8064d5d94df7abdf741575e0f18a [2023-02-18 20:09:07,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 20:09:07,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 20:09:07,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 20:09:07,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 20:09:07,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 20:09:07,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e170378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07, skipping insertion in model container [2023-02-18 20:09:07,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 20:09:07,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 20:09:07,604 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i[808,821] [2023-02-18 20:09:07,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:09:07,635 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 20:09:07,650 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i[808,821] [2023-02-18 20:09:07,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 20:09:07,669 INFO L208 MainTranslator]: Completed translation [2023-02-18 20:09:07,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07 WrapperNode [2023-02-18 20:09:07,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 20:09:07,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 20:09:07,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 20:09:07,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 20:09:07,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,703 INFO L138 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2023-02-18 20:09:07,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 20:09:07,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 20:09:07,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 20:09:07,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 20:09:07,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 20:09:07,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 20:09:07,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 20:09:07,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 20:09:07,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (1/1) ... [2023-02-18 20:09:07,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 20:09:07,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:07,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 20:09:07,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 20:09:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 20:09:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 20:09:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 20:09:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 20:09:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 20:09:07,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 20:09:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 20:09:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 20:09:07,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 20:09:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 20:09:07,868 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 20:09:07,871 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 20:09:08,074 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 20:09:08,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 20:09:08,079 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 20:09:08,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:09:08 BoogieIcfgContainer [2023-02-18 20:09:08,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 20:09:08,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 20:09:08,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 20:09:08,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 20:09:08,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:09:07" (1/3) ... [2023-02-18 20:09:08,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a6b879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:09:08, skipping insertion in model container [2023-02-18 20:09:08,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:09:07" (2/3) ... [2023-02-18 20:09:08,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a6b879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:09:08, skipping insertion in model container [2023-02-18 20:09:08,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:09:08" (3/3) ... [2023-02-18 20:09:08,106 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2023-02-18 20:09:08,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 20:09:08,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-02-18 20:09:08,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 20:09:08,166 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;@6debd07, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 20:09:08,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-02-18 20:09:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:09:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 20:09:08,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:08,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 20:09:08,173 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)] === [2023-02-18 20:09:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-18 20:09:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:08,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027122421] [2023-02-18 20:09:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:08,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:08,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027122421] [2023-02-18 20:09:08,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027122421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:08,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:08,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:09:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79061476] [2023-02-18 20:09:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:09:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:09:08,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:09:08,374 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:08,413 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-02-18 20:09:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:09:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-18 20:09:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:08,419 INFO L225 Difference]: With dead ends: 40 [2023-02-18 20:09:08,419 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 20:09:08,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:09:08,422 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:08,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 20:09:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-18 20:09:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:09:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-02-18 20:09:08,444 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 4 [2023-02-18 20:09:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:08,444 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-02-18 20:09:08,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-02-18 20:09:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 20:09:08,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:08,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 20:09:08,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 20:09:08,446 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)] === [2023-02-18 20:09:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-18 20:09:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:08,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008664005] [2023-02-18 20:09:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:08,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:08,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:08,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008664005] [2023-02-18 20:09:08,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008664005] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:08,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:08,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 20:09:08,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543141562] [2023-02-18 20:09:08,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:08,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 20:09:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 20:09:08,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:09:08,533 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:08,588 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2023-02-18 20:09:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 20:09:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-18 20:09:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:08,589 INFO L225 Difference]: With dead ends: 61 [2023-02-18 20:09:08,589 INFO L226 Difference]: Without dead ends: 61 [2023-02-18 20:09:08,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 20:09:08,590 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:08,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-18 20:09:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2023-02-18 20:09:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 46 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 20:09:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-18 20:09:08,597 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 4 [2023-02-18 20:09:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:08,597 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-18 20:09:08,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-18 20:09:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 20:09:08,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:08,598 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:08,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 20:09:08,598 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)] === [2023-02-18 20:09:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-18 20:09:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:08,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581075063] [2023-02-18 20:09:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581075063] [2023-02-18 20:09:08,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581075063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:08,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777689083] [2023-02-18 20:09:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:08,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:08,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 20:09:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 20:09:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:08,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:08,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:08,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777689083] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:08,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:08,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-02-18 20:09:08,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854879503] [2023-02-18 20:09:08,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:09:08,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:09:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:09:08,926 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:09,128 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2023-02-18 20:09:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 20:09:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 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 [2023-02-18 20:09:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:09,134 INFO L225 Difference]: With dead ends: 123 [2023-02-18 20:09:09,135 INFO L226 Difference]: Without dead ends: 123 [2023-02-18 20:09:09,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-02-18 20:09:09,137 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:09,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 97 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-18 20:09:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2023-02-18 20:09:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.3) internal successors, (117), 94 states have internal predecessors, (117), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:09:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2023-02-18 20:09:09,153 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 8 [2023-02-18 20:09:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:09,154 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2023-02-18 20:09:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2023-02-18 20:09:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 20:09:09,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:09,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:09,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:09,360 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 [2023-02-18 20:09:09,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1897655597, now seen corresponding path program 1 times [2023-02-18 20:09:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507116312] [2023-02-18 20:09:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:09,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:09,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:09,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507116312] [2023-02-18 20:09:09,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507116312] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:09,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:09,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 20:09:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253768543] [2023-02-18 20:09:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:09,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 20:09:09,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 20:09:09,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:09,452 INFO L87 Difference]: Start difference. First operand 104 states and 133 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) [2023-02-18 20:09:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:09,484 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2023-02-18 20:09:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:09:09,484 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 9 [2023-02-18 20:09:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:09,486 INFO L225 Difference]: With dead ends: 103 [2023-02-18 20:09:09,486 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 20:09:09,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 20:09:09,490 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:09,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 61 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 20:09:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 20:09:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 20:09:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.25) internal successors, (110), 91 states have internal predecessors, (110), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:09:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2023-02-18 20:09:09,495 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 9 [2023-02-18 20:09:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:09,496 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2023-02-18 20:09:09,496 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) [2023-02-18 20:09:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2023-02-18 20:09:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 20:09:09,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:09,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:09,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 20:09:09,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:09,498 INFO L85 PathProgramCache]: Analyzing trace with hash -290279188, now seen corresponding path program 1 times [2023-02-18 20:09:09,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:09,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583747084] [2023-02-18 20:09:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:09,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:09,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:09,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583747084] [2023-02-18 20:09:09,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583747084] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:09,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:09,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 20:09:09,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935794503] [2023-02-18 20:09:09,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:09,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 20:09:09,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 20:09:09,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:09:09,549 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:09,610 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2023-02-18 20:09:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 20:09:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 20:09:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:09,611 INFO L225 Difference]: With dead ends: 125 [2023-02-18 20:09:09,611 INFO L226 Difference]: Without dead ends: 119 [2023-02-18 20:09:09,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 20:09:09,612 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:09,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-18 20:09:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2023-02-18 20:09:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:09:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2023-02-18 20:09:09,618 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 13 [2023-02-18 20:09:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:09,618 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2023-02-18 20:09:09,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2023-02-18 20:09:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 20:09:09,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:09,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:09,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 20:09:09,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2023-02-18 20:09:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:09,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071667060] [2023-02-18 20:09:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:09,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 20:09:09,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071667060] [2023-02-18 20:09:09,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071667060] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497356458] [2023-02-18 20:09:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:09,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:09,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:09,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 20:09:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 20:09:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:09,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-18 20:09:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:09,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497356458] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:09,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:09,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-02-18 20:09:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859147487] [2023-02-18 20:09:09,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:09,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 20:09:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 20:09:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-18 20:09:09,798 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:09,895 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2023-02-18 20:09:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 20:09:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 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 14 [2023-02-18 20:09:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:09,896 INFO L225 Difference]: With dead ends: 122 [2023-02-18 20:09:09,896 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 20:09:09,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-02-18 20:09:09,897 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 215 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:09,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 20:09:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2023-02-18 20:09:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:09:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2023-02-18 20:09:09,902 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 14 [2023-02-18 20:09:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:09,902 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2023-02-18 20:09:09,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2023-02-18 20:09:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 20:09:09,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:09,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:09,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 20:09:10,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 20:09:10,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1116060617, now seen corresponding path program 1 times [2023-02-18 20:09:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:10,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131214784] [2023-02-18 20:09:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 20:09:10,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:10,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131214784] [2023-02-18 20:09:10,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131214784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:10,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:10,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:09:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139239790] [2023-02-18 20:09:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:09:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:09:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:09:10,256 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:10,397 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2023-02-18 20:09:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:09:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 20:09:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:10,398 INFO L225 Difference]: With dead ends: 168 [2023-02-18 20:09:10,398 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 20:09:10,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:09:10,398 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:10,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 20:09:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2023-02-18 20:09:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 95 states have internal predecessors, (112), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 20:09:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2023-02-18 20:09:10,403 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 17 [2023-02-18 20:09:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:10,403 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2023-02-18 20:09:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2023-02-18 20:09:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 20:09:10,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:10,405 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-18 20:09:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 20:09:10,405 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-18 20:09:10,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511167580] [2023-02-18 20:09:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:10,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:10,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511167580] [2023-02-18 20:09:10,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511167580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:10,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088394701] [2023-02-18 20:09:10,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:09:10,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:10,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:10,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 20:09:10,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:09:10,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 20:09:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:10,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:10,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:10,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088394701] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:10,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:10,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-18 20:09:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470819788] [2023-02-18 20:09:10,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 20:09:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 20:09:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-02-18 20:09:10,656 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:11,210 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2023-02-18 20:09:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:09:11,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 [2023-02-18 20:09:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:11,211 INFO L225 Difference]: With dead ends: 314 [2023-02-18 20:09:11,211 INFO L226 Difference]: Without dead ends: 314 [2023-02-18 20:09:11,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2023-02-18 20:09:11,212 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 355 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:11,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 456 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 20:09:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-02-18 20:09:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 226. [2023-02-18 20:09:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 200 states have (on average 1.22) internal successors, (244), 203 states have internal predecessors, (244), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 20:09:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2023-02-18 20:09:11,228 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 20 [2023-02-18 20:09:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:11,229 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2023-02-18 20:09:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2023-02-18 20:09:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 20:09:11,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:11,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 20:09:11,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:11,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:11,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash -541087126, now seen corresponding path program 1 times [2023-02-18 20:09:11,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:11,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903216789] [2023-02-18 20:09:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 20:09:11,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903216789] [2023-02-18 20:09:11,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903216789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 20:09:11,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 20:09:11,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 20:09:11,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506248756] [2023-02-18 20:09:11,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 20:09:11,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 20:09:11,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 20:09:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 20:09:11,609 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:11,713 INFO L93 Difference]: Finished difference Result 291 states and 358 transitions. [2023-02-18 20:09:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 20:09:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 20:09:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:11,715 INFO L225 Difference]: With dead ends: 291 [2023-02-18 20:09:11,715 INFO L226 Difference]: Without dead ends: 291 [2023-02-18 20:09:11,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-18 20:09:11,716 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:11,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 20:09:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-02-18 20:09:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2023-02-18 20:09:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2160804020100502) internal successors, (242), 201 states have internal predecessors, (242), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 20:09:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2023-02-18 20:09:11,722 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 23 [2023-02-18 20:09:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:11,722 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2023-02-18 20:09:11,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2023-02-18 20:09:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 20:09:11,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:11,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-18 20:09:11,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 20:09:11,724 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)] === [2023-02-18 20:09:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1860491289, now seen corresponding path program 1 times [2023-02-18 20:09:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:11,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130177641] [2023-02-18 20:09:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 20:09:11,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130177641] [2023-02-18 20:09:11,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130177641] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079024136] [2023-02-18 20:09:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:11,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:11,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:11,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:11,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 20:09:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 20:09:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:11,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:11,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-02-18 20:09:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079024136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:11,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:11,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 23 [2023-02-18 20:09:11,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867482831] [2023-02-18 20:09:11,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:11,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 20:09:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 20:09:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2023-02-18 20:09:11,998 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:12,332 INFO L93 Difference]: Finished difference Result 319 states and 402 transitions. [2023-02-18 20:09:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 20:09:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 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 34 [2023-02-18 20:09:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:12,334 INFO L225 Difference]: With dead ends: 319 [2023-02-18 20:09:12,335 INFO L226 Difference]: Without dead ends: 319 [2023-02-18 20:09:12,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2023-02-18 20:09:12,335 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 584 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:12,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 314 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 20:09:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-18 20:09:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 224. [2023-02-18 20:09:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2160804020100502) internal successors, (242), 201 states have internal predecessors, (242), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 20:09:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2023-02-18 20:09:12,342 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 34 [2023-02-18 20:09:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:12,344 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2023-02-18 20:09:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2023-02-18 20:09:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 20:09:12,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:12,347 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2023-02-18 20:09:12,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:12,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:12,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2023-02-18 20:09:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:12,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529453515] [2023-02-18 20:09:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:12,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:12,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:12,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529453515] [2023-02-18 20:09:12,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529453515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:12,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371376555] [2023-02-18 20:09:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:09:12,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:12,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:12,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 20:09:12,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 20:09:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:12,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 20:09:12,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:12,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:13,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371376555] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:13,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:13,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-02-18 20:09:13,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853891077] [2023-02-18 20:09:13,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 20:09:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 20:09:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 20:09:13,193 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 34 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 34 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:15,335 INFO L93 Difference]: Finished difference Result 739 states and 939 transitions. [2023-02-18 20:09:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 20:09:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 34 states have internal predecessors, (126), 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 44 [2023-02-18 20:09:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:15,337 INFO L225 Difference]: With dead ends: 739 [2023-02-18 20:09:15,338 INFO L226 Difference]: Without dead ends: 739 [2023-02-18 20:09:15,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 20:09:15,339 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1572 mSDsluCounter, 1836 mSDsCounter, 0 mSdLazyCounter, 4039 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 4507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 4039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:15,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1596 Valid, 2029 Invalid, 4507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 4039 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 20:09:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-02-18 20:09:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 464. [2023-02-18 20:09:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 415 states have (on average 1.219277108433735) internal successors, (506), 417 states have internal predecessors, (506), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-18 20:09:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 594 transitions. [2023-02-18 20:09:15,349 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 594 transitions. Word has length 44 [2023-02-18 20:09:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:15,349 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 594 transitions. [2023-02-18 20:09:15,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 34 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 594 transitions. [2023-02-18 20:09:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 20:09:15,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:15,351 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2023-02-18 20:09:15,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:15,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 20:09:15,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash 994077573, now seen corresponding path program 2 times [2023-02-18 20:09:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:15,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333997362] [2023-02-18 20:09:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-18 20:09:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:15,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333997362] [2023-02-18 20:09:15,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333997362] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:15,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023816362] [2023-02-18 20:09:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 20:09:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:15,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:15,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 20:09:15,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 20:09:15,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 20:09:15,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 195 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 20:09:16,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:16,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2023-02-18 20:09:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 195 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 20:09:16,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023816362] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:16,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:16,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 16] total 39 [2023-02-18 20:09:16,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445399954] [2023-02-18 20:09:16,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:16,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 20:09:16,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 20:09:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 20:09:16,229 INFO L87 Difference]: Start difference. First operand 464 states and 594 transitions. Second operand has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:17,127 INFO L93 Difference]: Finished difference Result 709 states and 904 transitions. [2023-02-18 20:09:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 20:09:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 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 74 [2023-02-18 20:09:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:17,131 INFO L225 Difference]: With dead ends: 709 [2023-02-18 20:09:17,131 INFO L226 Difference]: Without dead ends: 709 [2023-02-18 20:09:17,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 20:09:17,132 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1500 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:17,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1514 Valid, 795 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 20:09:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-02-18 20:09:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 480. [2023-02-18 20:09:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 429 states have (on average 1.2214452214452214) internal successors, (524), 431 states have internal predecessors, (524), 46 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-02-18 20:09:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 616 transitions. [2023-02-18 20:09:17,143 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 616 transitions. Word has length 74 [2023-02-18 20:09:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:17,143 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 616 transitions. [2023-02-18 20:09:17,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 616 transitions. [2023-02-18 20:09:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 20:09:17,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:17,145 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1] [2023-02-18 20:09:17,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:17,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:17,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1667733768, now seen corresponding path program 4 times [2023-02-18 20:09:17,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:17,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134295107] [2023-02-18 20:09:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:17,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134295107] [2023-02-18 20:09:17,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134295107] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907801352] [2023-02-18 20:09:17,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 20:09:17,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:17,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:17,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:17,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 20:09:18,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 20:09:18,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 20:09:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:18,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:18,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:19,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907801352] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:19,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:19,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 71 [2023-02-18 20:09:19,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3076091] [2023-02-18 20:09:19,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:19,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-18 20:09:19,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-18 20:09:19,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=3866, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 20:09:19,722 INFO L87 Difference]: Start difference. First operand 480 states and 616 transitions. Second operand has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:28,035 INFO L93 Difference]: Finished difference Result 1593 states and 2037 transitions. [2023-02-18 20:09:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 20:09:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 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 92 [2023-02-18 20:09:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:28,042 INFO L225 Difference]: With dead ends: 1593 [2023-02-18 20:09:28,043 INFO L226 Difference]: Without dead ends: 1593 [2023-02-18 20:09:28,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2787, Invalid=5955, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 20:09:28,045 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 6857 mSDsluCounter, 8223 mSDsCounter, 0 mSdLazyCounter, 17256 mSolverCounterSat, 2857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6905 SdHoareTripleChecker+Valid, 8620 SdHoareTripleChecker+Invalid, 20113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2857 IncrementalHoareTripleChecker+Valid, 17256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:28,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6905 Valid, 8620 Invalid, 20113 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2857 Valid, 17256 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-02-18 20:09:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2023-02-18 20:09:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 944. [2023-02-18 20:09:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 847 states have (on average 1.2207792207792207) internal successors, (1034), 849 states have internal predecessors, (1034), 92 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-18 20:09:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1218 transitions. [2023-02-18 20:09:28,070 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1218 transitions. Word has length 92 [2023-02-18 20:09:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:28,070 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1218 transitions. [2023-02-18 20:09:28,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1218 transitions. [2023-02-18 20:09:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-02-18 20:09:28,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:28,076 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2023-02-18 20:09:28,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:28,283 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)] === [2023-02-18 20:09:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash -459665215, now seen corresponding path program 3 times [2023-02-18 20:09:28,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:28,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226898665] [2023-02-18 20:09:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-02-18 20:09:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:28,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226898665] [2023-02-18 20:09:28,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226898665] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:28,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985893450] [2023-02-18 20:09:28,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 20:09:28,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:28,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:28,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 20:09:28,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 20:09:28,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 20:09:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 107 proven. 14 refuted. 0 times theorem prover too weak. 1306 trivial. 0 not checked. [2023-02-18 20:09:28,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 1306 trivial. 0 not checked. [2023-02-18 20:09:28,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985893450] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:28,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:28,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 29 [2023-02-18 20:09:28,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754490140] [2023-02-18 20:09:28,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 20:09:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 20:09:28,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2023-02-18 20:09:28,983 INFO L87 Difference]: Start difference. First operand 944 states and 1218 transitions. Second operand has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:09:30,716 INFO L93 Difference]: Finished difference Result 1228 states and 1577 transitions. [2023-02-18 20:09:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 20:09:30,717 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 30 states have internal predecessors, (99), 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 154 [2023-02-18 20:09:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:09:30,718 INFO L225 Difference]: With dead ends: 1228 [2023-02-18 20:09:30,718 INFO L226 Difference]: Without dead ends: 189 [2023-02-18 20:09:30,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=641, Invalid=1909, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 20:09:30,719 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1322 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 3947 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 4401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 3947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 20:09:30,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2178 Invalid, 4401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 3947 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 20:09:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-18 20:09:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-18 20:09:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2023-02-18 20:09:30,721 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 154 [2023-02-18 20:09:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:09:30,721 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2023-02-18 20:09:30,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:09:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2023-02-18 20:09:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-18 20:09:30,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:09:30,724 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1] [2023-02-18 20:09:30,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 20:09:30,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 20:09:30,928 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:09:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:09:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash -78753968, now seen corresponding path program 5 times [2023-02-18 20:09:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:09:30,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972549547] [2023-02-18 20:09:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:09:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:09:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:09:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:32,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:09:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972549547] [2023-02-18 20:09:32,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972549547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:09:32,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751616705] [2023-02-18 20:09:32,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 20:09:32,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:09:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:09:32,618 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 20:09:32,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 20:09:37,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-02-18 20:09:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 20:09:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-18 20:09:37,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 20:09:37,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 20:09:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:39,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 20:09:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:09:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751616705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 20:09:45,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 20:09:45,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 142 [2023-02-18 20:09:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926632873] [2023-02-18 20:09:45,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 20:09:45,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-02-18 20:09:45,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 20:09:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-02-18 20:09:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4748, Invalid=15558, Unknown=0, NotChecked=0, Total=20306 [2023-02-18 20:09:45,050 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 143 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 143 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:10:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 20:10:03,167 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2023-02-18 20:10:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-18 20:10:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 143 states have internal predecessors, (562), 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 188 [2023-02-18 20:10:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 20:10:03,169 INFO L225 Difference]: With dead ends: 381 [2023-02-18 20:10:03,169 INFO L226 Difference]: Without dead ends: 381 [2023-02-18 20:10:03,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=11326, Invalid=24206, Unknown=0, NotChecked=0, Total=35532 [2023-02-18 20:10:03,176 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 98 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 9829 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3224 SdHoareTripleChecker+Invalid, 9831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-18 20:10:03,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3224 Invalid, 9831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9829 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-18 20:10:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-18 20:10:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2023-02-18 20:10:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.0026315789473683) internal successors, (381), 380 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:10:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2023-02-18 20:10:03,180 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 188 [2023-02-18 20:10:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 20:10:03,180 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2023-02-18 20:10:03,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 143 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 20:10:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2023-02-18 20:10:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-02-18 20:10:03,183 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 20:10:03,183 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 94, 94, 1, 1, 1] [2023-02-18 20:10:03,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 20:10:03,392 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,SelfDestructingSolverStorable14 [2023-02-18 20:10:03,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-02-18 20:10:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 20:10:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1796709344, now seen corresponding path program 6 times [2023-02-18 20:10:03,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 20:10:03,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535101051] [2023-02-18 20:10:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 20:10:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 20:10:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 20:10:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 0 proven. 17672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 20:10:09,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 20:10:09,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535101051] [2023-02-18 20:10:09,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535101051] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 20:10:09,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149664639] [2023-02-18 20:10:09,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 20:10:09,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 20:10:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 20:10:09,371 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) [2023-02-18 20:10:09,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process