./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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-simple/dll2n_insert_unequal.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 97351642d4f3bf3f6d868e0a3719427b4c33bd5e0f87a93a325784728b912f03 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:18:37,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:18:37,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:18:37,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:18:37,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:18:37,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:18:37,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:18:37,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:18:37,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:18:37,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:18:37,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:18:37,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:18:37,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:18:37,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:18:37,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:18:37,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:18:37,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:18:37,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:18:37,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:18:37,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:18:37,948 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:18:37,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:18:37,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:18:37,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:18:37,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:18:37,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:18:37,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:18:37,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:18:37,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:18:37,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:18:37,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:18:37,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:18:37,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:18:37,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:18:37,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:18:37,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:18:37,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:18:37,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:18:37,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:18:37,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:18:37,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:18:37,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:18:37,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:18:37,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:18:37,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:18:37,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:18:37,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:18:37,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:18:37,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:18:37,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:18:37,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:18:37,995 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:18:37,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:18:37,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:18:37,996 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:18:37,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:18:37,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:18:37,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:18:37,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:18:37,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:18:37,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:18:37,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:18:37,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:18:37,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:18:37,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:18:37,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:18:37,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:18:38,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97351642d4f3bf3f6d868e0a3719427b4c33bd5e0f87a93a325784728b912f03 [2022-07-20 06:18:38,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:18:38,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:18:38,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:18:38,196 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:18:38,197 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:18:38,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2022-07-20 06:18:38,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090181836/e793f8be8ca84486b5ca95b02d01da33/FLAG2e895be84 [2022-07-20 06:18:38,606 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:18:38,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2022-07-20 06:18:38,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090181836/e793f8be8ca84486b5ca95b02d01da33/FLAG2e895be84 [2022-07-20 06:18:38,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/090181836/e793f8be8ca84486b5ca95b02d01da33 [2022-07-20 06:18:38,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:18:38,989 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:18:38,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:18:38,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:18:39,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:18:39,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:18:38" (1/1) ... [2022-07-20 06:18:39,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bb9532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39, skipping insertion in model container [2022-07-20 06:18:39,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:18:38" (1/1) ... [2022-07-20 06:18:39,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:18:39,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:18:39,323 WARN L230 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-simple/dll2n_insert_unequal.i[24989,25002] [2022-07-20 06:18:39,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:18:39,334 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:18:39,380 WARN L230 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-simple/dll2n_insert_unequal.i[24989,25002] [2022-07-20 06:18:39,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:18:39,403 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:18:39,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39 WrapperNode [2022-07-20 06:18:39,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:18:39,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:18:39,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:18:39,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:18:39,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,448 INFO L137 Inliner]: procedures = 127, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2022-07-20 06:18:39,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:18:39,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:18:39,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:18:39,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:18:39,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:18:39,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:18:39,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:18:39,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:18:39,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (1/1) ... [2022-07-20 06:18:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:18:39,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:39,518 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) [2022-07-20 06:18:39,523 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 [2022-07-20 06:18:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-20 06:18:39,557 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-20 06:18:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:18:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:18:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:18:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:18:39,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:18:39,702 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:18:39,704 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:18:39,735 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-20 06:18:40,055 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:18:40,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:18:40,063 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-20 06:18:40,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:18:40 BoogieIcfgContainer [2022-07-20 06:18:40,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:18:40,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:18:40,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:18:40,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:18:40,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:18:38" (1/3) ... [2022-07-20 06:18:40,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557d0e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:18:40, skipping insertion in model container [2022-07-20 06:18:40,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:39" (2/3) ... [2022-07-20 06:18:40,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557d0e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:18:40, skipping insertion in model container [2022-07-20 06:18:40,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:18:40" (3/3) ... [2022-07-20 06:18:40,074 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_insert_unequal.i [2022-07-20 06:18:40,084 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:18:40,084 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2022-07-20 06:18:40,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:18:40,123 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a7152c6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4fb8d79e [2022-07-20 06:18:40,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-07-20 06:18:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 70 states have (on average 2.157142857142857) internal successors, (151), 132 states have internal predecessors, (151), 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) [2022-07-20 06:18:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:18:40,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:40,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:18:40,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2022-07-20 06:18:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:40,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533212414] [2022-07-20 06:18:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533212414] [2022-07-20 06:18:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533212414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:40,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:40,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:18:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744050648] [2022-07-20 06:18:40,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:40,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:40,306 INFO L87 Difference]: Start difference. First operand has 134 states, 70 states have (on average 2.157142857142857) internal successors, (151), 132 states have internal predecessors, (151), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-20 06:18:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:40,510 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-07-20 06:18:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-07-20 06:18:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:40,521 INFO L225 Difference]: With dead ends: 241 [2022-07-20 06:18:40,522 INFO L226 Difference]: Without dead ends: 234 [2022-07-20 06:18:40,523 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 [2022-07-20 06:18:40,527 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 130 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:40,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 274 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-20 06:18:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 125. [2022-07-20 06:18:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 2.029850746268657) internal successors, (136), 124 states have internal predecessors, (136), 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) [2022-07-20 06:18:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2022-07-20 06:18:40,586 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 5 [2022-07-20 06:18:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:40,586 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2022-07-20 06:18:40,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-20 06:18:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2022-07-20 06:18:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:18:40,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:40,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:18:40,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:18:40,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2022-07-20 06:18:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:40,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950146707] [2022-07-20 06:18:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:40,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950146707] [2022-07-20 06:18:40,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950146707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:40,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:40,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:18:40,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237395823] [2022-07-20 06:18:40,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:40,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:40,661 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-20 06:18:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:40,794 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2022-07-20 06:18:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:40,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-07-20 06:18:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:40,797 INFO L225 Difference]: With dead ends: 233 [2022-07-20 06:18:40,797 INFO L226 Difference]: Without dead ends: 233 [2022-07-20 06:18:40,800 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 [2022-07-20 06:18:40,802 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 128 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:40,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 268 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-20 06:18:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 122. [2022-07-20 06:18:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 121 states have internal predecessors, (133), 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) [2022-07-20 06:18:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2022-07-20 06:18:40,820 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 5 [2022-07-20 06:18:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:40,821 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2022-07-20 06:18:40,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-20 06:18:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2022-07-20 06:18:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:18:40,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:40,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:40,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:18:40,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2100113040, now seen corresponding path program 1 times [2022-07-20 06:18:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312214397] [2022-07-20 06:18:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:40,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312214397] [2022-07-20 06:18:40,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312214397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:40,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:40,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361860402] [2022-07-20 06:18:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:40,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:40,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:40,870 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-20 06:18:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:40,877 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2022-07-20 06:18:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 06:18:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:40,879 INFO L225 Difference]: With dead ends: 132 [2022-07-20 06:18:40,879 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 06:18:40,880 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 [2022-07-20 06:18:40,881 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 10 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:40,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 260 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 06:18:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2022-07-20 06:18:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 122 states have internal predecessors, (134), 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) [2022-07-20 06:18:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2022-07-20 06:18:40,885 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 7 [2022-07-20 06:18:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:40,886 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2022-07-20 06:18:40,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-20 06:18:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2022-07-20 06:18:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 06:18:40,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:40,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:40,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:18:40,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2022-07-20 06:18:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:40,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31849586] [2022-07-20 06:18:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31849586] [2022-07-20 06:18:40,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31849586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:40,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:40,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:40,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855423850] [2022-07-20 06:18:40,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:40,952 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand has 3 states, 3 states have (on average 3.0) 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) [2022-07-20 06:18:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:40,962 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-07-20 06:18:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) 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 9 [2022-07-20 06:18:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:40,963 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:18:40,964 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:18:40,964 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 [2022-07-20 06:18:40,968 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:40,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 255 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:18:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-07-20 06:18:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 73 states have (on average 1.904109589041096) internal successors, (139), 127 states have internal predecessors, (139), 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) [2022-07-20 06:18:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2022-07-20 06:18:40,978 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 9 [2022-07-20 06:18:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:40,978 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2022-07-20 06:18:40,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) 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) [2022-07-20 06:18:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2022-07-20 06:18:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 06:18:40,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:40,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:18:40,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -763066913, now seen corresponding path program 1 times [2022-07-20 06:18:40,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579734526] [2022-07-20 06:18:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:41,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:41,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579734526] [2022-07-20 06:18:41,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579734526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:41,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823858124] [2022-07-20 06:18:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:41,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:41,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:41,020 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) [2022-07-20 06:18:41,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:18:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:18:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:41,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:41,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823858124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:41,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:41,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-20 06:18:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289584906] [2022-07-20 06:18:41,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:41,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:41,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:41,190 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:41,205 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2022-07-20 06:18:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 06:18:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:41,206 INFO L225 Difference]: With dead ends: 130 [2022-07-20 06:18:41,209 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 06:18:41,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:41,210 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 16 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:41,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 509 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 06:18:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-20 06:18:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.88) internal successors, (141), 129 states have internal predecessors, (141), 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) [2022-07-20 06:18:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 141 transitions. [2022-07-20 06:18:41,217 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 141 transitions. Word has length 14 [2022-07-20 06:18:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:41,217 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 141 transitions. [2022-07-20 06:18:41,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 141 transitions. [2022-07-20 06:18:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:18:41,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:41,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:41,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:41,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:41,440 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2022-07-20 06:18:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:41,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842566627] [2022-07-20 06:18:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:41,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842566627] [2022-07-20 06:18:41,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842566627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60890102] [2022-07-20 06:18:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:41,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:41,568 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) [2022-07-20 06:18:41,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:18:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 06:18:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:41,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:41,700 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:18:41,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-07-20 06:18:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:41,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:41,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60890102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:41,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:41,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-20 06:18:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845219753] [2022-07-20 06:18:41,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:18:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:18:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:41,825 INFO L87 Difference]: Start difference. First operand 130 states and 141 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-07-20 06:18:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:41,907 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2022-07-20 06:18:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 [2022-07-20 06:18:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:41,908 INFO L225 Difference]: With dead ends: 141 [2022-07-20 06:18:41,908 INFO L226 Difference]: Without dead ends: 141 [2022-07-20 06:18:41,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:18:41,909 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 367 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:41,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 103 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-07-20 06:18:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-20 06:18:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-07-20 06:18:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 128 states have internal predecessors, (140), 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) [2022-07-20 06:18:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2022-07-20 06:18:41,912 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 16 [2022-07-20 06:18:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:41,912 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2022-07-20 06:18:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-07-20 06:18:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2022-07-20 06:18:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:18:41,913 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:41,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:41,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:42,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-20 06:18:42,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2022-07-20 06:18:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:42,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557631521] [2022-07-20 06:18:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:42,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557631521] [2022-07-20 06:18:42,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557631521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:42,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153532177] [2022-07-20 06:18:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:42,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:42,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:42,198 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) [2022-07-20 06:18:42,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:18:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 06:18:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:42,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:42,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:42,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:42,330 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:18:42,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:18:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:42,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:42,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153532177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:42,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:42,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-20 06:18:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559240255] [2022-07-20 06:18:42,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:42,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:18:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:18:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:18:42,507 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-07-20 06:18:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:42,641 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-07-20 06:18:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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 [2022-07-20 06:18:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:42,643 INFO L225 Difference]: With dead ends: 140 [2022-07-20 06:18:42,643 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 06:18:42,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:18:42,644 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 763 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:42,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 76 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-20 06:18:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 06:18:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2022-07-20 06:18:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 127 states have internal predecessors, (139), 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) [2022-07-20 06:18:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2022-07-20 06:18:42,646 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 16 [2022-07-20 06:18:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:42,647 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2022-07-20 06:18:42,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-07-20 06:18:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2022-07-20 06:18:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 06:18:42,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:42,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:42,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:42,858 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957328, now seen corresponding path program 2 times [2022-07-20 06:18:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:42,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83048201] [2022-07-20 06:18:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:42,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:42,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83048201] [2022-07-20 06:18:42,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83048201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:42,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619508893] [2022-07-20 06:18:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:18:42,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:42,895 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) [2022-07-20 06:18:42,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:18:42,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:18:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:18:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:18:42,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:42,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:42,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:42,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619508893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:42,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:42,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-20 06:18:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473279477] [2022-07-20 06:18:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:42,973 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:43,022 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-07-20 06:18:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 06:18:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:43,023 INFO L225 Difference]: With dead ends: 137 [2022-07-20 06:18:43,023 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 06:18:43,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:43,024 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 110 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:43,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 89 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 06:18:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2022-07-20 06:18:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 124 states have internal predecessors, (136), 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) [2022-07-20 06:18:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2022-07-20 06:18:43,026 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 21 [2022-07-20 06:18:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:43,026 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2022-07-20 06:18:43,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2022-07-20 06:18:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 06:18:43,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:43,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:43,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:43,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:43,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957327, now seen corresponding path program 1 times [2022-07-20 06:18:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:43,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878763341] [2022-07-20 06:18:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:43,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878763341] [2022-07-20 06:18:43,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878763341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:43,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844385443] [2022-07-20 06:18:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:43,282 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) [2022-07-20 06:18:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:18:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:18:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:43,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:43,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844385443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:43,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:43,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-20 06:18:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420625157] [2022-07-20 06:18:43,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:18:43,418 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2022-07-20 06:18:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:43,434 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2022-07-20 06:18:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2022-07-20 06:18:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:43,436 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:18:43,436 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 06:18:43,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:43,438 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 239 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:43,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 06:18:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-20 06:18:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.8) internal successors, (135), 124 states have internal predecessors, (135), 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) [2022-07-20 06:18:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-07-20 06:18:43,440 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 21 [2022-07-20 06:18:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:43,440 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-07-20 06:18:43,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2022-07-20 06:18:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-07-20 06:18:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 06:18:43,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:43,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:43,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:43,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:43,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2020822092, now seen corresponding path program 1 times [2022-07-20 06:18:43,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:43,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003961103] [2022-07-20 06:18:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:43,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:43,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003961103] [2022-07-20 06:18:43,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003961103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:43,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:43,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:18:43,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390333404] [2022-07-20 06:18:43,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:43,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:43,711 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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) [2022-07-20 06:18:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:43,759 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2022-07-20 06:18:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 22 [2022-07-20 06:18:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:43,760 INFO L225 Difference]: With dead ends: 122 [2022-07-20 06:18:43,760 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 06:18:43,760 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 [2022-07-20 06:18:43,760 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 110 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:43,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 84 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 06:18:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-20 06:18:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.76) internal successors, (132), 121 states have internal predecessors, (132), 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) [2022-07-20 06:18:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2022-07-20 06:18:43,763 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 22 [2022-07-20 06:18:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:43,764 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2022-07-20 06:18:43,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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) [2022-07-20 06:18:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2022-07-20 06:18:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 06:18:43,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:43,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:43,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 06:18:43,765 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash 157247510, now seen corresponding path program 1 times [2022-07-20 06:18:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617941316] [2022-07-20 06:18:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617941316] [2022-07-20 06:18:43,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617941316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565556476] [2022-07-20 06:18:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:43,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:43,863 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) [2022-07-20 06:18:43,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:18:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 06:18:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:43,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:43,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:43,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:44,012 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:18:44,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 06:18:44,035 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:18:44,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 06:18:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:18:44,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:18:44,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565556476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:44,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:44,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-07-20 06:18:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306648830] [2022-07-20 06:18:44,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:44,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:18:44,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:18:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:18:44,109 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 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) [2022-07-20 06:18:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:44,199 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-07-20 06:18:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 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 27 [2022-07-20 06:18:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:44,200 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:18:44,200 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:18:44,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:18:44,201 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 312 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:44,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 100 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-07-20 06:18:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:18:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2022-07-20 06:18:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 114 states have internal predecessors, (125), 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) [2022-07-20 06:18:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-07-20 06:18:44,203 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 27 [2022-07-20 06:18:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:44,203 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-07-20 06:18:44,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 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) [2022-07-20 06:18:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-07-20 06:18:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 06:18:44,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:44,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:44,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:44,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash 157247511, now seen corresponding path program 1 times [2022-07-20 06:18:44,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:44,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154078463] [2022-07-20 06:18:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:18:44,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154078463] [2022-07-20 06:18:44,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154078463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663270968] [2022-07-20 06:18:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:44,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:44,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:44,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:44,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:18:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 06:18:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:44,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:44,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:44,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:44,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:44,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:44,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:44,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663270968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:44,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:44,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-20 06:18:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071783614] [2022-07-20 06:18:44,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:44,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:44,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:18:44,756 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-07-20 06:18:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:44,819 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2022-07-20 06:18:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 27 [2022-07-20 06:18:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:44,820 INFO L225 Difference]: With dead ends: 108 [2022-07-20 06:18:44,820 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 06:18:44,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:44,821 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:44,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 71 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 06:18:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-20 06:18:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.5733333333333333) internal successors, (118), 107 states have internal predecessors, (118), 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) [2022-07-20 06:18:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2022-07-20 06:18:44,823 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 27 [2022-07-20 06:18:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:44,823 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2022-07-20 06:18:44,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-07-20 06:18:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2022-07-20 06:18:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:18:44,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:44,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:44,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:45,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:45,036 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:45,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708524, now seen corresponding path program 1 times [2022-07-20 06:18:45,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:45,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992309348] [2022-07-20 06:18:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:45,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992309348] [2022-07-20 06:18:45,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992309348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:45,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:45,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 06:18:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425851520] [2022-07-20 06:18:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:45,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:18:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:18:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:18:45,168 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:45,472 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2022-07-20 06:18:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:18:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 06:18:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:45,473 INFO L225 Difference]: With dead ends: 195 [2022-07-20 06:18:45,473 INFO L226 Difference]: Without dead ends: 195 [2022-07-20 06:18:45,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-07-20 06:18:45,474 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 639 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:45,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 284 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:18:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-20 06:18:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 116. [2022-07-20 06:18:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 115 states have internal predecessors, (137), 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) [2022-07-20 06:18:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2022-07-20 06:18:45,476 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 30 [2022-07-20 06:18:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:45,476 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2022-07-20 06:18:45,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2022-07-20 06:18:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:18:45,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:45,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 06:18:45,477 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708523, now seen corresponding path program 1 times [2022-07-20 06:18:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611719176] [2022-07-20 06:18:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:45,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611719176] [2022-07-20 06:18:45,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611719176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:45,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:45,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 06:18:45,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153166669] [2022-07-20 06:18:45,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:45,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:18:45,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:18:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:18:45,649 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:45,930 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2022-07-20 06:18:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:18:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 06:18:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:45,931 INFO L225 Difference]: With dead ends: 184 [2022-07-20 06:18:45,931 INFO L226 Difference]: Without dead ends: 184 [2022-07-20 06:18:45,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:18:45,932 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 629 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:45,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 248 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:18:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-20 06:18:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 116. [2022-07-20 06:18:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 83 states have (on average 1.6265060240963856) internal successors, (135), 115 states have internal predecessors, (135), 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) [2022-07-20 06:18:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-07-20 06:18:45,934 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 30 [2022-07-20 06:18:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:45,934 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-07-20 06:18:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-07-20 06:18:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 06:18:45,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:45,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 06:18:45,935 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -55260162, now seen corresponding path program 1 times [2022-07-20 06:18:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970964688] [2022-07-20 06:18:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:45,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970964688] [2022-07-20 06:18:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970964688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:45,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:45,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:45,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936616360] [2022-07-20 06:18:45,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:45,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:45,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:45,966 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-07-20 06:18:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:45,973 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2022-07-20 06:18:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 31 [2022-07-20 06:18:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:45,974 INFO L225 Difference]: With dead ends: 159 [2022-07-20 06:18:45,974 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 06:18:45,974 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 [2022-07-20 06:18:45,975 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:45,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 196 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 06:18:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 111. [2022-07-20 06:18:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.564102564102564) internal successors, (122), 110 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) [2022-07-20 06:18:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-07-20 06:18:45,976 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 31 [2022-07-20 06:18:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:45,977 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-07-20 06:18:45,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-07-20 06:18:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-07-20 06:18:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 06:18:45,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:45,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:45,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 06:18:45,977 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1713045098, now seen corresponding path program 1 times [2022-07-20 06:18:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488757498] [2022-07-20 06:18:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488757498] [2022-07-20 06:18:46,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488757498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:46,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:46,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:18:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594755225] [2022-07-20 06:18:46,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:46,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:46,012 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-07-20 06:18:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:46,079 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2022-07-20 06:18:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 06:18:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:46,080 INFO L225 Difference]: With dead ends: 120 [2022-07-20 06:18:46,080 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 06:18:46,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:46,081 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 254 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:46,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 106 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 06:18:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2022-07-20 06:18:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 107 states have internal predecessors, (119), 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) [2022-07-20 06:18:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2022-07-20 06:18:46,082 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 32 [2022-07-20 06:18:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:46,083 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2022-07-20 06:18:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-07-20 06:18:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2022-07-20 06:18:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 06:18:46,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:46,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 06:18:46,083 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1713045097, now seen corresponding path program 1 times [2022-07-20 06:18:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:46,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626350984] [2022-07-20 06:18:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626350984] [2022-07-20 06:18:46,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626350984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229483504] [2022-07-20 06:18:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:46,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:46,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:46,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:46,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 06:18:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:18:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:46,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:46,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229483504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:46,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:46,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-20 06:18:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217727248] [2022-07-20 06:18:46,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:46,295 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-07-20 06:18:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:46,305 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2022-07-20 06:18:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:46,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 06:18:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:46,305 INFO L225 Difference]: With dead ends: 107 [2022-07-20 06:18:46,305 INFO L226 Difference]: Without dead ends: 107 [2022-07-20 06:18:46,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:18:46,306 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 99 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-20 06:18:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-07-20 06:18:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 106 states have internal predecessors, (117), 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) [2022-07-20 06:18:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-07-20 06:18:46,308 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 32 [2022-07-20 06:18:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:46,308 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-07-20 06:18:46,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-07-20 06:18:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-07-20 06:18:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 06:18:46,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:46,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:46,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:46,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 06:18:46,526 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1563834333, now seen corresponding path program 1 times [2022-07-20 06:18:46,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:46,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008931822] [2022-07-20 06:18:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:46,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:46,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008931822] [2022-07-20 06:18:46,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008931822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226859777] [2022-07-20 06:18:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:46,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:46,574 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:46,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 06:18:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 06:18:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:46,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:46,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226859777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:46,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:46,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-07-20 06:18:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543885037] [2022-07-20 06:18:46,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:46,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:18:46,762 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-07-20 06:18:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:46,775 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2022-07-20 06:18:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:46,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 33 [2022-07-20 06:18:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:46,776 INFO L225 Difference]: With dead ends: 104 [2022-07-20 06:18:46,776 INFO L226 Difference]: Without dead ends: 104 [2022-07-20 06:18:46,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:18:46,777 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 254 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:46,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 123 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-20 06:18:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-20 06:18:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.486842105263158) internal successors, (113), 103 states have internal predecessors, (113), 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) [2022-07-20 06:18:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2022-07-20 06:18:46,779 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 33 [2022-07-20 06:18:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:46,780 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2022-07-20 06:18:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-07-20 06:18:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2022-07-20 06:18:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 06:18:46,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:46,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:46,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:46,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 06:18:46,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1234225649, now seen corresponding path program 1 times [2022-07-20 06:18:46,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:46,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460782171] [2022-07-20 06:18:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:47,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460782171] [2022-07-20 06:18:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460782171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:47,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:47,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774398983] [2022-07-20 06:18:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:47,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:18:47,058 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 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) [2022-07-20 06:18:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:47,142 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2022-07-20 06:18:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 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 34 [2022-07-20 06:18:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:47,143 INFO L225 Difference]: With dead ends: 161 [2022-07-20 06:18:47,143 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 06:18:47,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:47,144 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:47,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 170 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 06:18:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 103. [2022-07-20 06:18:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.4736842105263157) internal successors, (112), 102 states have internal predecessors, (112), 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) [2022-07-20 06:18:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2022-07-20 06:18:47,145 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 34 [2022-07-20 06:18:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:47,146 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2022-07-20 06:18:47,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 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) [2022-07-20 06:18:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2022-07-20 06:18:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 06:18:47,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:47,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 06:18:47,146 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:47,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1234225648, now seen corresponding path program 1 times [2022-07-20 06:18:47,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:47,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931665680] [2022-07-20 06:18:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:47,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931665680] [2022-07-20 06:18:47,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931665680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:47,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:47,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:47,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917269062] [2022-07-20 06:18:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:47,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:18:47,186 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 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) [2022-07-20 06:18:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:47,260 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-07-20 06:18:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 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 34 [2022-07-20 06:18:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:47,260 INFO L225 Difference]: With dead ends: 102 [2022-07-20 06:18:47,261 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 06:18:47,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:47,261 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 78 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:47,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 130 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 06:18:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-20 06:18:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 101 states have internal predecessors, (111), 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) [2022-07-20 06:18:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2022-07-20 06:18:47,263 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 34 [2022-07-20 06:18:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2022-07-20 06:18:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 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) [2022-07-20 06:18:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2022-07-20 06:18:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 06:18:47,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:47,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:47,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 06:18:47,264 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash 393710610, now seen corresponding path program 1 times [2022-07-20 06:18:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:47,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135324723] [2022-07-20 06:18:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 06:18:47,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:47,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135324723] [2022-07-20 06:18:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135324723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:47,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:47,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:18:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552750492] [2022-07-20 06:18:47,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:47,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:47,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:47,311 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-20 06:18:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:47,373 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-07-20 06:18:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 35 [2022-07-20 06:18:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:47,374 INFO L225 Difference]: With dead ends: 99 [2022-07-20 06:18:47,375 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 06:18:47,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:47,375 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 238 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:47,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 83 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 06:18:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-20 06:18:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 98 states have internal predecessors, (108), 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) [2022-07-20 06:18:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2022-07-20 06:18:47,377 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 35 [2022-07-20 06:18:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:47,377 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2022-07-20 06:18:47,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-20 06:18:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2022-07-20 06:18:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 06:18:47,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:47,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 06:18:47,379 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-07-20 06:18:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash -522865965, now seen corresponding path program 1 times [2022-07-20 06:18:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466291585] [2022-07-20 06:18:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466291585] [2022-07-20 06:18:47,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466291585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821177014] [2022-07-20 06:18:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:47,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:47,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:47,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 06:18:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 06:18:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:47,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:18:47,961 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:18:47,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-07-20 06:18:48,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:18:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 06:18:48,117 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:18:48,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-20 06:18:48,262 INFO L356 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2022-07-20 06:18:48,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2022-07-20 06:18:48,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,335 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:18:48,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2022-07-20 06:18:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-07-20 06:18:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,366 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:18:48,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2022-07-20 06:18:48,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-07-20 06:18:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-07-20 06:18:48,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:48,408 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:18:48,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2022-07-20 06:18:48,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:18:48,541 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:18:48,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2022-07-20 06:18:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:48,720 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1703 (Array Int Int)) (v_ArrVal_1702 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1702))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_insert_~head#1.base|) |c_ULTIMATE.start_dll_insert_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1703) |c_ULTIMATE.start_dll_insert_~head#1.base|) |c_ULTIMATE.start_dll_insert_~head#1.offset|) 4))) 1)) is different from false [2022-07-20 06:18:48,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2022-07-20 06:18:48,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-07-20 06:18:50,410 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 06:18:50,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 211 treesize of output 141 [2022-07-20 06:18:50,804 INFO L356 Elim1Store]: treesize reduction 241, result has 54.1 percent of original size [2022-07-20 06:18:50,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 1078 treesize of output 1231