./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.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 fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:30:42,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:30:42,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:30:42,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:30:42,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:30:42,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:30:42,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:30:42,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:30:42,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:30:42,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:30:42,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:30:42,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:30:42,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:30:42,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:30:42,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:30:42,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:30:42,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:30:42,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:30:42,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:30:42,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:30:42,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:30:42,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:30:42,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:30:42,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:30:42,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:30:42,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:30:42,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:30:42,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:30:42,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:30:42,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:30:42,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:30:42,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:30:42,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:30:42,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:30:42,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:30:42,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:30:42,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:30:42,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:30:42,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:30:42,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:30:42,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:30:42,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 03:30:43,013 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:30:43,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:30:43,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:30:43,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:30:43,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:30:43,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:30:43,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:30:43,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:30:43,015 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:30:43,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:30:43,016 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:30:43,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 03:30:43,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:30:43,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 03:30:43,018 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:30:43,018 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:30:43,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:30:43,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:30:43,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:30:43,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:30:43,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:30:43,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:30:43,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:30:43,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:30:43,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:30:43,020 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:30:43,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:30:43,020 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:30:43,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2023-02-17 03:30:43,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:30:43,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:30:43,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:30:43,237 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:30:43,237 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:30:43,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2023-02-17 03:30:44,183 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:30:44,425 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:30:44,426 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2023-02-17 03:30:44,435 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b910f1c0c/2c4150f1b30142edb9fe21c09671d515/FLAG613f63a1a [2023-02-17 03:30:44,447 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b910f1c0c/2c4150f1b30142edb9fe21c09671d515 [2023-02-17 03:30:44,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:30:44,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:30:44,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:30:44,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:30:44,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:30:44,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342dbc4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44, skipping insertion in model container [2023-02-17 03:30:44,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:30:44,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:30:44,683 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/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2023-02-17 03:30:44,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:30:44,690 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:30:44,727 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/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2023-02-17 03:30:44,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:30:44,752 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:30:44,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44 WrapperNode [2023-02-17 03:30:44,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:30:44,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:30:44,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:30:44,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:30:44,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,800 INFO L138 Inliner]: procedures = 129, calls = 39, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 185 [2023-02-17 03:30:44,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:30:44,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:30:44,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:30:44,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:30:44,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:30:44,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:30:44,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:30:44,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:30:44,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (1/1) ... [2023-02-17 03:30:44,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:30:44,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:44,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 03:30:44,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 03:30:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-17 03:30:44,922 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-17 03:30:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 03:30:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 03:30:44,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:30:44,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:30:45,012 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:30:45,014 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:30:45,043 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-17 03:30:45,260 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:30:45,264 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:30:45,264 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2023-02-17 03:30:45,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:30:45 BoogieIcfgContainer [2023-02-17 03:30:45,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:30:45,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:30:45,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:30:45,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:30:45,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:30:44" (1/3) ... [2023-02-17 03:30:45,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12632e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:30:45, skipping insertion in model container [2023-02-17 03:30:45,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:44" (2/3) ... [2023-02-17 03:30:45,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12632e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:30:45, skipping insertion in model container [2023-02-17 03:30:45,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:30:45" (3/3) ... [2023-02-17 03:30:45,272 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2023-02-17 03:30:45,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:30:45,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-02-17 03:30:45,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:30:45,312 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;@7d359a99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:30:45,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-02-17 03:30:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 115 states have internal predecessors, (140), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 03:30:45,318 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:45,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 03:30:45,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1083078, now seen corresponding path program 1 times [2023-02-17 03:30:45,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:45,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660267681] [2023-02-17 03:30:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:45,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660267681] [2023-02-17 03:30:45,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660267681] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:45,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:45,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527760590] [2023-02-17 03:30:45,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:45,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 03:30:45,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 03:30:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 03:30:45,461 INFO L87 Difference]: Start difference. First operand has 117 states, 72 states have (on average 1.9444444444444444) internal successors, (140), 115 states have internal predecessors, (140), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:45,478 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2023-02-17 03:30:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 03:30:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-17 03:30:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:45,485 INFO L225 Difference]: With dead ends: 117 [2023-02-17 03:30:45,485 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 03:30:45,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 03:30:45,491 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:45,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 03:30:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-02-17 03:30:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2023-02-17 03:30:45,513 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 4 [2023-02-17 03:30:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:45,513 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2023-02-17 03:30:45,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2023-02-17 03:30:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 03:30:45,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:45,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 03:30:45,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:30:45,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1079730, now seen corresponding path program 1 times [2023-02-17 03:30:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:45,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76702500] [2023-02-17 03:30:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:45,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76702500] [2023-02-17 03:30:45,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76702500] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:45,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:45,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:45,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074439299] [2023-02-17 03:30:45,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:45,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:45,569 INFO L87 Difference]: Start difference. First operand 111 states and 124 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) [2023-02-17 03:30:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:45,660 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2023-02-17 03:30:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:45,660 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 [2023-02-17 03:30:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:45,661 INFO L225 Difference]: With dead ends: 136 [2023-02-17 03:30:45,662 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 03:30:45,662 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 [2023-02-17 03:30:45,663 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 113 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:45,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 99 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 03:30:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2023-02-17 03:30:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.7681159420289856) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2023-02-17 03:30:45,675 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 4 [2023-02-17 03:30:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:45,676 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2023-02-17 03:30:45,676 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) [2023-02-17 03:30:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2023-02-17 03:30:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 03:30:45,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:45,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 03:30:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:30:45,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1079731, now seen corresponding path program 1 times [2023-02-17 03:30:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954568081] [2023-02-17 03:30:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:45,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954568081] [2023-02-17 03:30:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954568081] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:45,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:45,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:30:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221050063] [2023-02-17 03:30:45,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:45,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:45,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:45,749 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:45,774 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2023-02-17 03:30:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:45,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-17 03:30:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:45,776 INFO L225 Difference]: With dead ends: 157 [2023-02-17 03:30:45,776 INFO L226 Difference]: Without dead ends: 157 [2023-02-17 03:30:45,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:45,777 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 52 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:45,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 226 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-17 03:30:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2023-02-17 03:30:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.7571428571428571) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2023-02-17 03:30:45,783 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 4 [2023-02-17 03:30:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:45,784 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2023-02-17 03:30:45,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2023-02-17 03:30:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 03:30:45,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:45,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:30:45,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash -336207078, now seen corresponding path program 1 times [2023-02-17 03:30:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:45,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042340454] [2023-02-17 03:30:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042340454] [2023-02-17 03:30:45,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042340454] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:45,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935856426] [2023-02-17 03:30:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:45,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:30:45,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 03:30:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 03:30:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935856426] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:45,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:45,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 03:30:45,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945866670] [2023-02-17 03:30:45,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:45,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:30:45,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:30:45,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:30:45,941 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:45,982 INFO L93 Difference]: Finished difference Result 244 states and 268 transitions. [2023-02-17 03:30:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:30:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 03:30:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:45,984 INFO L225 Difference]: With dead ends: 244 [2023-02-17 03:30:45,984 INFO L226 Difference]: Without dead ends: 244 [2023-02-17 03:30:45,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:30:45,986 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 307 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:45,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 603 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-17 03:30:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 173. [2023-02-17 03:30:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 172 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2023-02-17 03:30:45,994 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 9 [2023-02-17 03:30:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:45,994 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2023-02-17 03:30:45,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2023-02-17 03:30:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:30:45,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:45,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:46,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 03:30:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:46,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash -991177183, now seen corresponding path program 1 times [2023-02-17 03:30:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138562150] [2023-02-17 03:30:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:46,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138562150] [2023-02-17 03:30:46,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138562150] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:46,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:46,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976807752] [2023-02-17 03:30:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:46,263 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:46,337 INFO L93 Difference]: Finished difference Result 329 states and 444 transitions. [2023-02-17 03:30:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 03:30:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:46,342 INFO L225 Difference]: With dead ends: 329 [2023-02-17 03:30:46,342 INFO L226 Difference]: Without dead ends: 329 [2023-02-17 03:30:46,343 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 [2023-02-17 03:30:46,346 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:46,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 270 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-17 03:30:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 172. [2023-02-17 03:30:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 133 states have (on average 1.7293233082706767) internal successors, (230), 171 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 230 transitions. [2023-02-17 03:30:46,369 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 230 transitions. Word has length 11 [2023-02-17 03:30:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:46,369 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 230 transitions. [2023-02-17 03:30:46,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 230 transitions. [2023-02-17 03:30:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:30:46,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:46,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 03:30:46,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -991177182, now seen corresponding path program 1 times [2023-02-17 03:30:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160591308] [2023-02-17 03:30:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:46,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:46,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:46,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160591308] [2023-02-17 03:30:46,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160591308] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:46,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:46,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:46,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395135242] [2023-02-17 03:30:46,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:46,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:46,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:46,460 INFO L87 Difference]: Start difference. First operand 172 states and 230 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:46,535 INFO L93 Difference]: Finished difference Result 330 states and 442 transitions. [2023-02-17 03:30:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 03:30:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:46,536 INFO L225 Difference]: With dead ends: 330 [2023-02-17 03:30:46,536 INFO L226 Difference]: Without dead ends: 330 [2023-02-17 03:30:46,539 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 [2023-02-17 03:30:46,542 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 114 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:46,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 278 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-17 03:30:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 171. [2023-02-17 03:30:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 133 states have (on average 1.7067669172932332) internal successors, (227), 170 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2023-02-17 03:30:46,549 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 11 [2023-02-17 03:30:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:46,549 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2023-02-17 03:30:46,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2023-02-17 03:30:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 03:30:46,550 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:46,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:46,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 03:30:46,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -661772220, now seen corresponding path program 1 times [2023-02-17 03:30:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600528061] [2023-02-17 03:30:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:46,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:46,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600528061] [2023-02-17 03:30:46,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600528061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:46,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:46,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:46,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211259600] [2023-02-17 03:30:46,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:46,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:46,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:46,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:46,583 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:46,638 INFO L93 Difference]: Finished difference Result 244 states and 312 transitions. [2023-02-17 03:30:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 03:30:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:46,639 INFO L225 Difference]: With dead ends: 244 [2023-02-17 03:30:46,639 INFO L226 Difference]: Without dead ends: 244 [2023-02-17 03:30:46,639 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 [2023-02-17 03:30:46,640 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 105 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:46,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 204 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-17 03:30:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2023-02-17 03:30:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.6616541353383458) internal successors, (221), 168 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2023-02-17 03:30:46,645 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 12 [2023-02-17 03:30:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:46,645 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2023-02-17 03:30:46,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2023-02-17 03:30:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 03:30:46,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:46,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:46,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 03:30:46,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -661772219, now seen corresponding path program 1 times [2023-02-17 03:30:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175915378] [2023-02-17 03:30:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:46,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175915378] [2023-02-17 03:30:46,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175915378] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:46,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:46,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 03:30:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347659703] [2023-02-17 03:30:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:30:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:30:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:30:46,729 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:46,787 INFO L93 Difference]: Finished difference Result 376 states and 459 transitions. [2023-02-17 03:30:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:30:46,787 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 03:30:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:46,788 INFO L225 Difference]: With dead ends: 376 [2023-02-17 03:30:46,788 INFO L226 Difference]: Without dead ends: 376 [2023-02-17 03:30:46,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:30:46,789 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 234 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:46,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 812 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-02-17 03:30:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 172. [2023-02-17 03:30:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 136 states have (on average 1.6470588235294117) internal successors, (224), 171 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 224 transitions. [2023-02-17 03:30:46,793 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 224 transitions. Word has length 12 [2023-02-17 03:30:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:46,793 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 224 transitions. [2023-02-17 03:30:46,793 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 224 transitions. [2023-02-17 03:30:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 03:30:46,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:46,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:46,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 03:30:46,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash -51661170, now seen corresponding path program 1 times [2023-02-17 03:30:46,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:46,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690961202] [2023-02-17 03:30:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:46,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:46,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:46,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690961202] [2023-02-17 03:30:46,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690961202] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:46,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86077680] [2023-02-17 03:30:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:46,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:46,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:46,889 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) [2023-02-17 03:30:46,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 03:30:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:46,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:30:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:47,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86077680] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:47,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:47,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-02-17 03:30:47,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296764707] [2023-02-17 03:30:47,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:47,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:30:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:30:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:30:47,036 INFO L87 Difference]: Start difference. First operand 172 states and 224 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:47,103 INFO L93 Difference]: Finished difference Result 391 states and 474 transitions. [2023-02-17 03:30:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 03:30:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 03:30:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:47,105 INFO L225 Difference]: With dead ends: 391 [2023-02-17 03:30:47,105 INFO L226 Difference]: Without dead ends: 391 [2023-02-17 03:30:47,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:30:47,106 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 485 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:47,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 814 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-02-17 03:30:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 196. [2023-02-17 03:30:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 160 states have (on average 1.55) internal successors, (248), 195 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 248 transitions. [2023-02-17 03:30:47,109 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 248 transitions. Word has length 16 [2023-02-17 03:30:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:47,109 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 248 transitions. [2023-02-17 03:30:47,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 248 transitions. [2023-02-17 03:30:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 03:30:47,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:47,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-02-17 03:30:47,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:47,315 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,SelfDestructingSolverStorable8 [2023-02-17 03:30:47,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1254577850, now seen corresponding path program 2 times [2023-02-17 03:30:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:47,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996151946] [2023-02-17 03:30:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:30:47,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996151946] [2023-02-17 03:30:47,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996151946] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:47,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:47,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132881040] [2023-02-17 03:30:47,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:47,350 INFO L87 Difference]: Start difference. First operand 196 states and 248 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:47,395 INFO L93 Difference]: Finished difference Result 269 states and 337 transitions. [2023-02-17 03:30:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 19 [2023-02-17 03:30:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:47,396 INFO L225 Difference]: With dead ends: 269 [2023-02-17 03:30:47,396 INFO L226 Difference]: Without dead ends: 269 [2023-02-17 03:30:47,396 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 [2023-02-17 03:30:47,397 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 63 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:47,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 182 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-02-17 03:30:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 233. [2023-02-17 03:30:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 197 states have (on average 1.5532994923857868) internal successors, (306), 232 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 306 transitions. [2023-02-17 03:30:47,400 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 306 transitions. Word has length 19 [2023-02-17 03:30:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:47,401 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 306 transitions. [2023-02-17 03:30:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 306 transitions. [2023-02-17 03:30:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 03:30:47,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:47,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 03:30:47,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1435011604, now seen corresponding path program 1 times [2023-02-17 03:30:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:47,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797044720] [2023-02-17 03:30:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:30:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797044720] [2023-02-17 03:30:47,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797044720] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:47,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:47,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 03:30:47,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600565795] [2023-02-17 03:30:47,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:47,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:30:47,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:47,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:30:47,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:30:47,449 INFO L87 Difference]: Start difference. First operand 233 states and 306 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:47,492 INFO L93 Difference]: Finished difference Result 260 states and 321 transitions. [2023-02-17 03:30:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:30:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-17 03:30:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:47,493 INFO L225 Difference]: With dead ends: 260 [2023-02-17 03:30:47,493 INFO L226 Difference]: Without dead ends: 260 [2023-02-17 03:30:47,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:30:47,494 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 105 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:47,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 380 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-17 03:30:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 217. [2023-02-17 03:30:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 181 states have (on average 1.5248618784530388) internal successors, (276), 216 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 276 transitions. [2023-02-17 03:30:47,497 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 276 transitions. Word has length 23 [2023-02-17 03:30:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:47,497 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 276 transitions. [2023-02-17 03:30:47,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 276 transitions. [2023-02-17 03:30:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 03:30:47,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:47,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:47,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 03:30:47,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash 877276576, now seen corresponding path program 2 times [2023-02-17 03:30:47,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:47,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716975847] [2023-02-17 03:30:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:47,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 03:30:47,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:47,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716975847] [2023-02-17 03:30:47,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716975847] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:47,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246915339] [2023-02-17 03:30:47,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:30:47,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:47,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:47,662 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) [2023-02-17 03:30:47,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 03:30:47,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:30:47,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:30:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 03:30:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:47,754 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 [2023-02-17 03:30:47,758 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 [2023-02-17 03:30:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:47,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:47,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:47,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 03:30:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:47,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:47,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:47,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 137 [2023-02-17 03:30:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:48,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:48,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:48,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 75 [2023-02-17 03:30:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 03:30:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 03:30:48,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246915339] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:48,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:48,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-02-17 03:30:48,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552941451] [2023-02-17 03:30:48,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 03:30:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 03:30:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:30:48,761 INFO L87 Difference]: Start difference. First operand 217 states and 276 transitions. Second operand has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:48,877 INFO L93 Difference]: Finished difference Result 281 states and 339 transitions. [2023-02-17 03:30:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:30:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 03:30:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:48,879 INFO L225 Difference]: With dead ends: 281 [2023-02-17 03:30:48,879 INFO L226 Difference]: Without dead ends: 281 [2023-02-17 03:30:48,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:30:48,879 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 687 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:48,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 215 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-17 03:30:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 215. [2023-02-17 03:30:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 181 states have (on average 1.4917127071823204) internal successors, (270), 214 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 270 transitions. [2023-02-17 03:30:48,883 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 270 transitions. Word has length 24 [2023-02-17 03:30:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:48,883 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 270 transitions. [2023-02-17 03:30:48,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 270 transitions. [2023-02-17 03:30:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 03:30:48,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:48,884 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:48,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 03:30:49,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:49,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash 361607171, now seen corresponding path program 1 times [2023-02-17 03:30:49,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:49,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918392925] [2023-02-17 03:30:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:49,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:30:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:49,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918392925] [2023-02-17 03:30:49,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918392925] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:49,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:49,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 03:30:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115193196] [2023-02-17 03:30:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:30:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:30:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:30:49,125 INFO L87 Difference]: Start difference. First operand 215 states and 270 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:49,183 INFO L93 Difference]: Finished difference Result 233 states and 288 transitions. [2023-02-17 03:30:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:30:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 03:30:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:49,184 INFO L225 Difference]: With dead ends: 233 [2023-02-17 03:30:49,184 INFO L226 Difference]: Without dead ends: 233 [2023-02-17 03:30:49,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:30:49,186 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 15 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:49,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 407 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-17 03:30:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2023-02-17 03:30:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 183 states have (on average 1.4863387978142077) internal successors, (272), 216 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2023-02-17 03:30:49,190 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 25 [2023-02-17 03:30:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:49,190 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2023-02-17 03:30:49,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2023-02-17 03:30:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 03:30:49,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:49,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:49,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 03:30:49,191 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:49,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:49,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1675080075, now seen corresponding path program 1 times [2023-02-17 03:30:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:49,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407196650] [2023-02-17 03:30:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:49,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:30:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:49,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407196650] [2023-02-17 03:30:49,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407196650] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:49,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:49,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:30:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924520227] [2023-02-17 03:30:49,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:30:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:49,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:30:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:30:49,249 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:49,297 INFO L93 Difference]: Finished difference Result 219 states and 273 transitions. [2023-02-17 03:30:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:30:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-17 03:30:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:49,298 INFO L225 Difference]: With dead ends: 219 [2023-02-17 03:30:49,298 INFO L226 Difference]: Without dead ends: 211 [2023-02-17 03:30:49,298 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 [2023-02-17 03:30:49,298 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:49,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 264 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-17 03:30:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-02-17 03:30:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.502857142857143) internal successors, (263), 208 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 263 transitions. [2023-02-17 03:30:49,301 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 263 transitions. Word has length 26 [2023-02-17 03:30:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:49,302 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 263 transitions. [2023-02-17 03:30:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 263 transitions. [2023-02-17 03:30:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 03:30:49,302 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:49,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:49,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 03:30:49,303 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash -981051253, now seen corresponding path program 1 times [2023-02-17 03:30:49,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:49,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002083754] [2023-02-17 03:30:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:49,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:30:49,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002083754] [2023-02-17 03:30:49,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002083754] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:49,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:49,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:30:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34019427] [2023-02-17 03:30:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:30:49,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:30:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:30:49,345 INFO L87 Difference]: Start difference. First operand 209 states and 263 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:49,406 INFO L93 Difference]: Finished difference Result 235 states and 289 transitions. [2023-02-17 03:30:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:30:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 03:30:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:49,407 INFO L225 Difference]: With dead ends: 235 [2023-02-17 03:30:49,407 INFO L226 Difference]: Without dead ends: 235 [2023-02-17 03:30:49,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 03:30:49,421 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 293 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:49,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 169 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-02-17 03:30:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2023-02-17 03:30:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 175 states have (on average 1.4857142857142858) internal successors, (260), 207 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2023-02-17 03:30:49,424 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 29 [2023-02-17 03:30:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:49,424 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2023-02-17 03:30:49,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2023-02-17 03:30:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 03:30:49,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:49,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:49,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 03:30:49,425 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -981051252, now seen corresponding path program 1 times [2023-02-17 03:30:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:49,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084766244] [2023-02-17 03:30:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:49,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:30:49,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:49,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084766244] [2023-02-17 03:30:49,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084766244] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:49,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:49,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 03:30:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757792202] [2023-02-17 03:30:49,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 03:30:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 03:30:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:30:49,554 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:49,613 INFO L93 Difference]: Finished difference Result 207 states and 257 transitions. [2023-02-17 03:30:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:30:49,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 03:30:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:49,614 INFO L225 Difference]: With dead ends: 207 [2023-02-17 03:30:49,614 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 03:30:49,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:30:49,614 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 302 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:49,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 126 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 03:30:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-02-17 03:30:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 175 states have (on average 1.4685714285714286) internal successors, (257), 206 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2023-02-17 03:30:49,617 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 29 [2023-02-17 03:30:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:49,617 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2023-02-17 03:30:49,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2023-02-17 03:30:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 03:30:49,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:49,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:49,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 03:30:49,618 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash -347817722, now seen corresponding path program 1 times [2023-02-17 03:30:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:49,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731430861] [2023-02-17 03:30:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 03:30:49,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731430861] [2023-02-17 03:30:49,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731430861] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:49,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812415415] [2023-02-17 03:30:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:49,859 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) [2023-02-17 03:30:49,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 03:30:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 03:30:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:49,976 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 [2023-02-17 03:30:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:49,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:49,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:49,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:50,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 03:30:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 03:30:50,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812415415] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:50,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:50,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-17 03:30:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9974876] [2023-02-17 03:30:50,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:50,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:30:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:30:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:30:50,205 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:50,279 INFO L93 Difference]: Finished difference Result 230 states and 278 transitions. [2023-02-17 03:30:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:30:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 9 states have internal predecessors, (56), 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 30 [2023-02-17 03:30:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:50,280 INFO L225 Difference]: With dead ends: 230 [2023-02-17 03:30:50,280 INFO L226 Difference]: Without dead ends: 230 [2023-02-17 03:30:50,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:30:50,281 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 479 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:50,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 87 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-17 03:30:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 203. [2023-02-17 03:30:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 175 states have (on average 1.4228571428571428) internal successors, (249), 202 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 249 transitions. [2023-02-17 03:30:50,283 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 249 transitions. Word has length 30 [2023-02-17 03:30:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:50,284 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 249 transitions. [2023-02-17 03:30:50,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 249 transitions. [2023-02-17 03:30:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 03:30:50,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:50,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:50,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:50,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 03:30:50,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash -347817723, now seen corresponding path program 1 times [2023-02-17 03:30:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:50,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063869006] [2023-02-17 03:30:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 03:30:50,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:50,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063869006] [2023-02-17 03:30:50,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063869006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:50,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515332357] [2023-02-17 03:30:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:50,654 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) [2023-02-17 03:30:50,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 03:30:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 03:30:50,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:50,754 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 [2023-02-17 03:30:50,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:50,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:50,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:50,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:30:50,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:50,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 68 [2023-02-17 03:30:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:30:50,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:30:51,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515332357] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:51,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:51,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-17 03:30:51,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155342914] [2023-02-17 03:30:51,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 03:30:51,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 03:30:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:30:51,006 INFO L87 Difference]: Start difference. First operand 203 states and 249 transitions. Second operand has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:51,067 INFO L93 Difference]: Finished difference Result 228 states and 272 transitions. [2023-02-17 03:30:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:30:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-17 03:30:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:51,068 INFO L225 Difference]: With dead ends: 228 [2023-02-17 03:30:51,068 INFO L226 Difference]: Without dead ends: 228 [2023-02-17 03:30:51,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 38 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:30:51,068 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 278 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:51,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 129 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-17 03:30:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2023-02-17 03:30:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 175 states have (on average 1.3885714285714286) internal successors, (243), 200 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 243 transitions. [2023-02-17 03:30:51,073 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 243 transitions. Word has length 30 [2023-02-17 03:30:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:51,073 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 243 transitions. [2023-02-17 03:30:51,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:30:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 243 transitions. [2023-02-17 03:30:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 03:30:51,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:51,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:51,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:51,278 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,SelfDestructingSolverStorable17 [2023-02-17 03:30:51,279 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-02-17 03:30:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1918350099, now seen corresponding path program 1 times [2023-02-17 03:30:51,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053421077] [2023-02-17 03:30:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 03:30:51,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:51,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053421077] [2023-02-17 03:30:51,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053421077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:51,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512093037] [2023-02-17 03:30:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:51,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:51,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:51,579 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) [2023-02-17 03:30:51,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 03:30:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-17 03:30:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:51,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 03:30:51,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2023-02-17 03:30:51,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2023-02-17 03:30:51,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2023-02-17 03:30:51,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2023-02-17 03:30:51,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2023-02-17 03:30:51,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2023-02-17 03:30:51,845 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 22 treesize of output 20 [2023-02-17 03:30:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2023-02-17 03:30:51,853 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 22 treesize of output 20 [2023-02-17 03:30:51,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:51,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2023-02-17 03:30:51,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:51,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 543 treesize of output 1545 [2023-02-17 03:30:52,090 INFO L217 Elim1Store]: Index analysis took 118 ms [2023-02-17 03:30:52,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:52,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 459 treesize of output 1469