./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/getNumbers4-2.c --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/memsafety-ext3/getNumbers4-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f3d269e2deae26c7ce036912e3874a49494c634991dfc4135fd1a54005e7fac --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:33:34,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:33:34,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:33:34,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:33:34,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:33:34,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:33:34,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:33:34,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:33:34,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:33:34,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:33:34,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:33:34,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:33:34,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:33:34,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:33:34,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:33:34,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:33:34,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:33:34,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:33:34,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:33:34,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:33:34,336 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:33:34,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:33:34,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:33:34,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:33:34,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:33:34,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:33:34,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:33:34,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:33:34,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:33:34,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:33:34,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:33:34,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:33:34,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:33:34,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:33:34,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:33:34,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:33:34,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:33:34,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:33:34,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:33:34,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:33:34,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:33:34,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:33:34,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:33:34,394 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:33:34,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:33:34,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:33:34,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:33:34,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:33:34,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:33:34,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:33:34,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:33:34,397 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:33:34,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:33:34,399 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:33:34,399 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:33:34,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:33:34,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:33:34,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:33:34,400 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:33:34,400 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:33:34,400 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:33:34,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:33:34,401 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:33:34,402 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:33:34,402 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:33:34,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:33:34,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:33:34,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:33:34,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:33:34,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:33:34,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:33:34,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:33:34,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:33:34,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f3d269e2deae26c7ce036912e3874a49494c634991dfc4135fd1a54005e7fac [2022-07-20 06:33:34,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:33:34,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:33:34,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:33:34,686 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:33:34,687 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:33:34,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/getNumbers4-2.c [2022-07-20 06:33:34,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9daed9246/00900f2f4bd94c4f8f6f674abb6209c2/FLAG5f7c75250 [2022-07-20 06:33:35,144 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:33:35,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/getNumbers4-2.c [2022-07-20 06:33:35,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9daed9246/00900f2f4bd94c4f8f6f674abb6209c2/FLAG5f7c75250 [2022-07-20 06:33:35,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9daed9246/00900f2f4bd94c4f8f6f674abb6209c2 [2022-07-20 06:33:35,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:33:35,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:33:35,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:33:35,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:33:35,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:33:35,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5546d08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35, skipping insertion in model container [2022-07-20 06:33:35,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:33:35,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:33:35,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:33:35,386 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:33:35,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:33:35,429 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:33:35,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35 WrapperNode [2022-07-20 06:33:35,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:33:35,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:33:35,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:33:35,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:33:35,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,471 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 99 [2022-07-20 06:33:35,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:33:35,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:33:35,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:33:35,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:33:35,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:33:35,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:33:35,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:33:35,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:33:35,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (1/1) ... [2022-07-20 06:33:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:33:35,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:35,543 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 06:33:35,558 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 06:33:35,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:33:35,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:33:35,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:33:35,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:33:35,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:33:35,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:33:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:33:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:33:35,668 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:33:35,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:33:35,921 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:33:35,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:33:35,928 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-20 06:33:35,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:35 BoogieIcfgContainer [2022-07-20 06:33:35,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:33:35,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:33:35,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:33:35,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:33:35,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:33:35" (1/3) ... [2022-07-20 06:33:35,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691641be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:33:35, skipping insertion in model container [2022-07-20 06:33:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:35" (2/3) ... [2022-07-20 06:33:35,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691641be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:33:35, skipping insertion in model container [2022-07-20 06:33:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:35" (3/3) ... [2022-07-20 06:33:35,939 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers4-2.c [2022-07-20 06:33:35,958 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:33:35,959 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-07-20 06:33:36,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:33:36,007 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@2a7b6c4f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@341e1b4d [2022-07-20 06:33:36,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-07-20 06:33:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 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 06:33:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:33:36,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:36,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:33:36,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-20 06:33:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:36,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913164719] [2022-07-20 06:33:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:36,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:36,326 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 06:33:36,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913164719] [2022-07-20 06:33:36,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913164719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:36,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:36,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-20 06:33:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513713173] [2022-07-20 06:33:36,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:36,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:33:36,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:33:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:33:36,374 INFO L87 Difference]: Start difference. First operand has 53 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:36,455 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-07-20 06:33:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:33:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 06:33:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:36,465 INFO L225 Difference]: With dead ends: 52 [2022-07-20 06:33:36,465 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 06:33:36,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 06:33:36,470 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:36,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 58 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 06:33:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-20 06:33:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.588235294117647) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 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 06:33:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-20 06:33:36,507 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 4 [2022-07-20 06:33:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:36,508 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-20 06:33:36,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-20 06:33:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:33:36,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:36,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:33:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:33:36,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-20 06:33:36,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:36,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088596101] [2022-07-20 06:33:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:36,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:36,630 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 06:33:36,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088596101] [2022-07-20 06:33:36,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088596101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:36,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:36,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:33:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077832510] [2022-07-20 06:33:36,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:36,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:33:36,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:33:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:33:36,635 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:36,717 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-07-20 06:33:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:33:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 06:33:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:36,719 INFO L225 Difference]: With dead ends: 53 [2022-07-20 06:33:36,719 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 06:33:36,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:33:36,724 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:36,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 65 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 06:33:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-20 06:33:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-07-20 06:33:36,741 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 4 [2022-07-20 06:33:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:36,742 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-07-20 06:33:36,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-07-20 06:33:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:33:36,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:36,743 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-07-20 06:33:36,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:33:36,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2022-07-20 06:33:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535978094] [2022-07-20 06:33:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535978094] [2022-07-20 06:33:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535978094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466814952] [2022-07-20 06:33:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:36,951 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 06:33:36,984 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 06:33:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:37,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 06:33:37,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:37,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:37,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466814952] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:37,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:37,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-07-20 06:33:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414740727] [2022-07-20 06:33:37,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 06:33:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 06:33:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:33:37,255 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:33:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:37,493 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2022-07-20 06:33:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:33:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 7 [2022-07-20 06:33:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:37,496 INFO L225 Difference]: With dead ends: 59 [2022-07-20 06:33:37,496 INFO L226 Difference]: Without dead ends: 59 [2022-07-20 06:33:37,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-20 06:33:37,500 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 179 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:37,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 126 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-20 06:33:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-20 06:33:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-07-20 06:33:37,511 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 7 [2022-07-20 06:33:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:37,511 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-07-20 06:33:37,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:33:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-07-20 06:33:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 06:33:37,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:37,512 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:37,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 06:33:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:37,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 1 times [2022-07-20 06:33:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:37,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809105715] [2022-07-20 06:33:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:37,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:37,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809105715] [2022-07-20 06:33:37,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809105715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275356028] [2022-07-20 06:33:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:37,852 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 06:33:37,878 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 06:33:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 06:33:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:37,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:38,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275356028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:38,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:38,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-20 06:33:38,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661826419] [2022-07-20 06:33:38,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:38,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 06:33:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 06:33:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:33:38,017 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 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 06:33:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:38,061 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-07-20 06:33:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:33:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-20 06:33:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:38,063 INFO L225 Difference]: With dead ends: 77 [2022-07-20 06:33:38,063 INFO L226 Difference]: Without dead ends: 77 [2022-07-20 06:33:38,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:33:38,064 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:38,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 290 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-20 06:33:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-07-20 06:33:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 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 06:33:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-20 06:33:38,070 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 19 [2022-07-20 06:33:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:38,070 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-20 06:33:38,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 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 06:33:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-20 06:33:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:33:38,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:38,072 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:38,106 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 06:33:38,295 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,SelfDestructingSolverStorable3 [2022-07-20 06:33:38,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069290, now seen corresponding path program 2 times [2022-07-20 06:33:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:38,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101728173] [2022-07-20 06:33:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 100 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:38,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101728173] [2022-07-20 06:33:38,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101728173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:38,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961779007] [2022-07-20 06:33:38,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:33:38,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:38,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:38,611 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 06:33:38,612 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 06:33:38,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:33:38,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 06:33:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:38,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:33:38,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961779007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:38,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:33:38,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 17 [2022-07-20 06:33:38,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137856855] [2022-07-20 06:33:38,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:38,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:33:38,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:33:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-07-20 06:33:38,928 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 06:33:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:39,019 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-07-20 06:33:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:33:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 37 [2022-07-20 06:33:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:39,022 INFO L225 Difference]: With dead ends: 85 [2022-07-20 06:33:39,022 INFO L226 Difference]: Without dead ends: 85 [2022-07-20 06:33:39,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-07-20 06:33:39,023 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:39,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-20 06:33:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-07-20 06:33:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.3125) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-07-20 06:33:39,038 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 37 [2022-07-20 06:33:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:39,039 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-07-20 06:33:39,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 06:33:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-07-20 06:33:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:33:39,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:39,040 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:39,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 06:33:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:39,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 1 times [2022-07-20 06:33:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822363027] [2022-07-20 06:33:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:39,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-20 06:33:39,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822363027] [2022-07-20 06:33:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822363027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:39,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:39,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:33:39,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054091965] [2022-07-20 06:33:39,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:33:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:33:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:33:39,329 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:39,372 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-07-20 06:33:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:33:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 06:33:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:39,373 INFO L225 Difference]: With dead ends: 78 [2022-07-20 06:33:39,373 INFO L226 Difference]: Without dead ends: 78 [2022-07-20 06:33:39,374 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 06:33:39,374 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:39,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-20 06:33:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-20 06:33:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.28125) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 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 06:33:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-07-20 06:33:39,378 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 37 [2022-07-20 06:33:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:39,378 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-07-20 06:33:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-07-20 06:33:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 06:33:39,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:39,380 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:39,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 06:33:39,380 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -708557702, now seen corresponding path program 1 times [2022-07-20 06:33:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:39,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541982657] [2022-07-20 06:33:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:39,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:39,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541982657] [2022-07-20 06:33:39,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541982657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:39,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:39,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-20 06:33:39,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416691492] [2022-07-20 06:33:39,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:39,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:33:39,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:33:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:33:39,486 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:39,505 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-07-20 06:33:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:33:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-20 06:33:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:39,507 INFO L225 Difference]: With dead ends: 77 [2022-07-20 06:33:39,507 INFO L226 Difference]: Without dead ends: 77 [2022-07-20 06:33:39,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 06:33:39,509 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:39,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-20 06:33:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-07-20 06:33:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.265625) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 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 06:33:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-20 06:33:39,514 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 38 [2022-07-20 06:33:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:39,518 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-20 06:33:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-20 06:33:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 06:33:39,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:39,521 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:39,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 06:33:39,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash -708557701, now seen corresponding path program 1 times [2022-07-20 06:33:39,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136351402] [2022-07-20 06:33:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:39,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:39,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:39,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136351402] [2022-07-20 06:33:39,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136351402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:39,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:39,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:33:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324698608] [2022-07-20 06:33:39,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:39,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:33:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:33:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:33:39,603 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:39,642 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-20 06:33:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:33:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-20 06:33:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:39,643 INFO L225 Difference]: With dead ends: 80 [2022-07-20 06:33:39,643 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 06:33:39,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:33:39,644 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:39,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 06:33:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-07-20 06:33:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 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 06:33:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-07-20 06:33:39,656 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 38 [2022-07-20 06:33:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:39,657 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-07-20 06:33:39,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-07-20 06:33:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 06:33:39,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:39,661 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 06:33:39,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 414994334, now seen corresponding path program 1 times [2022-07-20 06:33:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:39,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066881717] [2022-07-20 06:33:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 100 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:39,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066881717] [2022-07-20 06:33:39,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066881717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:39,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291951835] [2022-07-20 06:33:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:39,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:39,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:39,932 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 06:33:39,950 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 06:33:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 06:33:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:40,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291951835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:40,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:40,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 4] total 23 [2022-07-20 06:33:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383715976] [2022-07-20 06:33:40,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:40,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 06:33:40,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 06:33:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-07-20 06:33:40,451 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 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 06:33:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:40,965 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-07-20 06:33:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:33:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 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 42 [2022-07-20 06:33:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:40,968 INFO L225 Difference]: With dead ends: 98 [2022-07-20 06:33:40,968 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 06:33:40,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 06:33:40,969 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 471 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:40,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 155 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:33:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 06:33:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-07-20 06:33:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:33:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-07-20 06:33:40,972 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 42 [2022-07-20 06:33:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:40,972 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-07-20 06:33:40,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 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 06:33:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-07-20 06:33:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:33:40,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:40,974 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:41,003 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 06:33:41,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:41,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -20077561, now seen corresponding path program 1 times [2022-07-20 06:33:41,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259325790] [2022-07-20 06:33:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:41,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:41,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259325790] [2022-07-20 06:33:41,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259325790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727640005] [2022-07-20 06:33:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:41,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:41,289 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 06:33:41,313 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 06:33:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 06:33:41,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:41,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:41,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727640005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:41,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:41,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-07-20 06:33:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643748593] [2022-07-20 06:33:41,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:33:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:33:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:33:41,791 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 06:33:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:41,958 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2022-07-20 06:33:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:33:41,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 43 [2022-07-20 06:33:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:41,959 INFO L225 Difference]: With dead ends: 93 [2022-07-20 06:33:41,959 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 06:33:41,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:33:41,960 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 126 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:41,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 92 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 06:33:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-20 06:33:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.2125) internal successors, (97), 92 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:33:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-20 06:33:41,962 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 43 [2022-07-20 06:33:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:41,963 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-20 06:33:41,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 06:33:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-20 06:33:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 06:33:41,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:41,964 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:41,991 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 06:33:42,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 06:33:42,164 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:42,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1470341546, now seen corresponding path program 2 times [2022-07-20 06:33:42,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:42,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683629568] [2022-07-20 06:33:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:42,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 100 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:33:42,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:42,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683629568] [2022-07-20 06:33:42,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683629568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:42,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505528842] [2022-07-20 06:33:42,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:33:42,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:42,476 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 06:33:42,477 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 06:33:42,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:33:42,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 06:33:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:42,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:43,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505528842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:43,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:43,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 32 [2022-07-20 06:33:43,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706568880] [2022-07-20 06:33:43,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 06:33:43,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 06:33:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 06:33:43,338 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 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 06:33:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:44,240 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-07-20 06:33:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 06:33:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 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) Word has length 57 [2022-07-20 06:33:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:44,242 INFO L225 Difference]: With dead ends: 137 [2022-07-20 06:33:44,242 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 06:33:44,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=708, Invalid=2262, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 06:33:44,244 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 663 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:44,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 270 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:33:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 06:33:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 122. [2022-07-20 06:33:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 121 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 06:33:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2022-07-20 06:33:44,247 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 57 [2022-07-20 06:33:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:44,248 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2022-07-20 06:33:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 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 06:33:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2022-07-20 06:33:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 06:33:44,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:44,249 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:44,278 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 06:33:44,474 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 06:33:44,475 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1664052357, now seen corresponding path program 2 times [2022-07-20 06:33:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:44,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930225023] [2022-07-20 06:33:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:44,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:44,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930225023] [2022-07-20 06:33:44,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930225023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:44,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531677759] [2022-07-20 06:33:44,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:33:44,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:44,684 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 06:33:44,686 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 06:33:44,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:33:44,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:44,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 06:33:44,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-20 06:33:45,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-20 06:33:45,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531677759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:45,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:45,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2022-07-20 06:33:45,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055346939] [2022-07-20 06:33:45,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:45,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 06:33:45,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 06:33:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-07-20 06:33:45,944 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:46,366 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2022-07-20 06:33:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:33:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-20 06:33:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:46,368 INFO L225 Difference]: With dead ends: 121 [2022-07-20 06:33:46,368 INFO L226 Difference]: Without dead ends: 121 [2022-07-20 06:33:46,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2022-07-20 06:33:46,368 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 366 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:46,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 268 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-20 06:33:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-20 06:33:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.18348623853211) internal successors, (129), 120 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:33:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2022-07-20 06:33:46,371 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 58 [2022-07-20 06:33:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:46,372 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2022-07-20 06:33:46,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2022-07-20 06:33:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 06:33:46,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:46,373 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:46,392 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 06:33:46,575 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 06:33:46,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash 797853176, now seen corresponding path program 1 times [2022-07-20 06:33:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:46,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624013273] [2022-07-20 06:33:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:46,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:46,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624013273] [2022-07-20 06:33:46,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624013273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81411615] [2022-07-20 06:33:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:46,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:46,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:46,664 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 06:33:46,665 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 06:33:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 06:33:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:46,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:46,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81411615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:46,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:46,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-07-20 06:33:46,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110590088] [2022-07-20 06:33:46,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:46,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 06:33:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 06:33:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:33:46,883 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:33:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:46,940 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-07-20 06:33:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:33:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 70 [2022-07-20 06:33:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:46,941 INFO L225 Difference]: With dead ends: 121 [2022-07-20 06:33:46,941 INFO L226 Difference]: Without dead ends: 121 [2022-07-20 06:33:46,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:33:46,942 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:46,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 178 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-20 06:33:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-20 06:33:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.146788990825688) internal successors, (125), 120 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 06:33:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-07-20 06:33:46,946 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 70 [2022-07-20 06:33:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:46,946 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-07-20 06:33:46,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 06:33:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-07-20 06:33:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-20 06:33:46,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:46,948 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:46,977 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 06:33:47,167 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,SelfDestructingSolverStorable12 [2022-07-20 06:33:47,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:47,168 INFO L85 PathProgramCache]: Analyzing trace with hash -713446614, now seen corresponding path program 3 times [2022-07-20 06:33:47,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:47,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927210004] [2022-07-20 06:33:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:47,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 199 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-20 06:33:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927210004] [2022-07-20 06:33:47,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927210004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:47,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692851652] [2022-07-20 06:33:47,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 06:33:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:47,295 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 06:33:47,296 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 06:33:47,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 06:33:47,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 06:33:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-20 06:33:47,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:33:47,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692851652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:47,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:33:47,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 19 [2022-07-20 06:33:47,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291596666] [2022-07-20 06:33:47,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:47,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:33:47,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:33:47,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-07-20 06:33:47,889 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 06:33:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:48,011 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-07-20 06:33:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:33:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 87 [2022-07-20 06:33:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:48,013 INFO L225 Difference]: With dead ends: 120 [2022-07-20 06:33:48,013 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 06:33:48,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-07-20 06:33:48,014 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 159 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:48,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 66 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 06:33:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-20 06:33:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-07-20 06:33:48,020 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 87 [2022-07-20 06:33:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:48,020 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-07-20 06:33:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 06:33:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-07-20 06:33:48,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 06:33:48,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:48,024 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:48,055 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 06:33:48,248 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,SelfDestructingSolverStorable13 [2022-07-20 06:33:48,248 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:48,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1503565048, now seen corresponding path program 2 times [2022-07-20 06:33:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:48,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031895261] [2022-07-20 06:33:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:48,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:48,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031895261] [2022-07-20 06:33:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031895261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:48,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:48,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:33:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237286510] [2022-07-20 06:33:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:48,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:33:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:33:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:33:48,330 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:48,373 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-07-20 06:33:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:33:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-20 06:33:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:48,374 INFO L225 Difference]: With dead ends: 118 [2022-07-20 06:33:48,374 INFO L226 Difference]: Without dead ends: 118 [2022-07-20 06:33:48,374 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 06:33:48,375 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:48,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 100 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-20 06:33:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-07-20 06:33:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 117 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 06:33:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-07-20 06:33:48,378 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 90 [2022-07-20 06:33:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:48,378 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-07-20 06:33:48,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-07-20 06:33:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 06:33:48,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:48,379 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:48,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 06:33:48,380 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1503565049, now seen corresponding path program 1 times [2022-07-20 06:33:48,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:48,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887478098] [2022-07-20 06:33:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:48,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-07-20 06:33:48,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:48,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887478098] [2022-07-20 06:33:48,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887478098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:48,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:48,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:33:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883319446] [2022-07-20 06:33:48,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:33:48,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:33:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:33:48,509 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:48,588 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2022-07-20 06:33:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:33:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-20 06:33:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:48,589 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:33:48,589 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 06:33:48,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:33:48,589 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:48,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 06:33:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-07-20 06:33:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-07-20 06:33:48,594 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 90 [2022-07-20 06:33:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:48,594 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-07-20 06:33:48,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-07-20 06:33:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 06:33:48,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:48,595 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:48,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 06:33:48,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -634123742, now seen corresponding path program 1 times [2022-07-20 06:33:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269931375] [2022-07-20 06:33:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:48,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269931375] [2022-07-20 06:33:48,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269931375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:48,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:48,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:33:48,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421450471] [2022-07-20 06:33:48,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:48,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:33:48,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:33:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:33:48,647 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 06:33:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:48,661 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2022-07-20 06:33:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:33:48,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 91 [2022-07-20 06:33:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:48,663 INFO L225 Difference]: With dead ends: 119 [2022-07-20 06:33:48,663 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 06:33:48,663 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 06:33:48,664 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:48,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 06:33:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-07-20 06:33:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-07-20 06:33:48,667 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 91 [2022-07-20 06:33:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:48,667 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-07-20 06:33:48,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 06:33:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-07-20 06:33:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 06:33:48,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:48,668 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:48,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 06:33:48,669 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -634123741, now seen corresponding path program 1 times [2022-07-20 06:33:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:48,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469976119] [2022-07-20 06:33:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469976119] [2022-07-20 06:33:48,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469976119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:48,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:33:48,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:33:48,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502205626] [2022-07-20 06:33:48,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:48,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:33:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:33:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:33:48,721 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 06:33:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:48,742 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-07-20 06:33:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:33:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 91 [2022-07-20 06:33:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:48,743 INFO L225 Difference]: With dead ends: 122 [2022-07-20 06:33:48,743 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 06:33:48,744 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 06:33:48,744 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:48,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 06:33:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-07-20 06:33:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 111 states have (on average 1.117117117117117) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-07-20 06:33:48,748 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 91 [2022-07-20 06:33:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:48,748 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-07-20 06:33:48,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 06:33:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-07-20 06:33:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 06:33:48,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:48,749 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:48,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 06:33:48,749 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:48,750 INFO L85 PathProgramCache]: Analyzing trace with hash 789303046, now seen corresponding path program 1 times [2022-07-20 06:33:48,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:48,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114124785] [2022-07-20 06:33:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:48,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-07-20 06:33:48,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114124785] [2022-07-20 06:33:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114124785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:48,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890788156] [2022-07-20 06:33:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:48,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:48,890 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 06:33:48,900 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 06:33:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 06:33:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:33:49,567 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 06:33:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:49,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:50,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890788156] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:50,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:50,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-07-20 06:33:50,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623991535] [2022-07-20 06:33:50,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:50,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:33:50,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:33:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:33:50,959 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 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 06:33:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:51,284 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2022-07-20 06:33:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:33:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 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 95 [2022-07-20 06:33:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:51,286 INFO L225 Difference]: With dead ends: 180 [2022-07-20 06:33:51,286 INFO L226 Difference]: Without dead ends: 180 [2022-07-20 06:33:51,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-07-20 06:33:51,287 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:51,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 230 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 158 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-20 06:33:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-20 06:33:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 134. [2022-07-20 06:33:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 125 states have (on average 1.136) internal successors, (142), 133 states have internal predecessors, (142), 0 states have call successors, (0), 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 06:33:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2022-07-20 06:33:51,291 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 95 [2022-07-20 06:33:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:51,291 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2022-07-20 06:33:51,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 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 06:33:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2022-07-20 06:33:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 06:33:51,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:51,293 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:51,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 06:33:51,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:51,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1301409354, now seen corresponding path program 1 times [2022-07-20 06:33:51,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411502447] [2022-07-20 06:33:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:51,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:51,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411502447] [2022-07-20 06:33:51,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411502447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:51,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760049861] [2022-07-20 06:33:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:51,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:51,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:33:51,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 06:33:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:51,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 06:33:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:51,725 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 06:33:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:51,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:51,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760049861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:51,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:51,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-07-20 06:33:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945846470] [2022-07-20 06:33:51,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:51,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:33:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:33:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:33:51,813 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 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 06:33:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:51,887 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2022-07-20 06:33:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:33:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 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 96 [2022-07-20 06:33:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:51,888 INFO L225 Difference]: With dead ends: 137 [2022-07-20 06:33:51,888 INFO L226 Difference]: Without dead ends: 137 [2022-07-20 06:33:51,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:33:51,890 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:51,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 124 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-20 06:33:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-07-20 06:33:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.119047619047619) internal successors, (141), 134 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 06:33:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2022-07-20 06:33:51,897 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 96 [2022-07-20 06:33:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:51,897 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2022-07-20 06:33:51,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 8 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 06:33:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2022-07-20 06:33:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 06:33:51,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:51,898 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:51,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 06:33:52,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:52,111 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash -265893408, now seen corresponding path program 1 times [2022-07-20 06:33:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631695651] [2022-07-20 06:33:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631695651] [2022-07-20 06:33:52,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631695651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299026475] [2022-07-20 06:33:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:52,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:52,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:52,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:33:52,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 06:33:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:33:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:52,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:52,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299026475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:52,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:52,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-20 06:33:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796350561] [2022-07-20 06:33:52,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:33:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:33:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:33:52,379 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:52,411 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-07-20 06:33:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:33:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-07-20 06:33:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:52,415 INFO L225 Difference]: With dead ends: 145 [2022-07-20 06:33:52,415 INFO L226 Difference]: Without dead ends: 145 [2022-07-20 06:33:52,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:33:52,416 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:52,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-20 06:33:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-07-20 06:33:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 134 states have (on average 1.1119402985074627) internal successors, (149), 142 states have internal predecessors, (149), 0 states have call successors, (0), 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 06:33:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2022-07-20 06:33:52,419 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 103 [2022-07-20 06:33:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:52,419 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2022-07-20 06:33:52,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2022-07-20 06:33:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 06:33:52,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:52,421 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:52,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 06:33:52,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-20 06:33:52,636 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:52,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1508601145, now seen corresponding path program 2 times [2022-07-20 06:33:52,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:52,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236565980] [2022-07-20 06:33:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-07-20 06:33:52,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:52,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236565980] [2022-07-20 06:33:52,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236565980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:52,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429994778] [2022-07-20 06:33:52,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:33:52,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:52,892 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:33:52,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 06:33:53,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:33:53,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 06:33:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:33:53,650 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 06:33:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:53,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:33:53,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429994778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:33:53,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:33:53,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2022-07-20 06:33:53,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006444329] [2022-07-20 06:33:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:33:53,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:33:53,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:53,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:33:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-07-20 06:33:53,864 INFO L87 Difference]: Start difference. First operand 143 states and 149 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:54,073 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2022-07-20 06:33:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:33:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-20 06:33:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:54,076 INFO L225 Difference]: With dead ends: 142 [2022-07-20 06:33:54,076 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 06:33:54,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-07-20 06:33:54,077 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 135 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:54,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 96 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 06:33:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-20 06:33:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 134 states have (on average 1.0970149253731343) internal successors, (147), 141 states have internal predecessors, (147), 0 states have call successors, (0), 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 06:33:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2022-07-20 06:33:54,081 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 110 [2022-07-20 06:33:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:54,081 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2022-07-20 06:33:54,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2022-07-20 06:33:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 06:33:54,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:54,082 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:54,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 06:33:54,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 06:33:54,296 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash -478004765, now seen corresponding path program 2 times [2022-07-20 06:33:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:54,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645091183] [2022-07-20 06:33:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:54,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645091183] [2022-07-20 06:33:54,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645091183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:54,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216511384] [2022-07-20 06:33:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:33:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:54,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:33:54,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 06:33:54,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:33:54,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 06:33:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:54,672 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 06:33:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2022-07-20 06:33:54,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2022-07-20 06:33:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216511384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:55,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:55,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2022-07-20 06:33:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300934982] [2022-07-20 06:33:55,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:55,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 06:33:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 06:33:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-07-20 06:33:55,241 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:55,535 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-07-20 06:33:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:33:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-20 06:33:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:55,537 INFO L225 Difference]: With dead ends: 142 [2022-07-20 06:33:55,537 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 06:33:55,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2022-07-20 06:33:55,537 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 249 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:55,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 198 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:33:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 06:33:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-07-20 06:33:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 140 states have internal predecessors, (145), 0 states have call successors, (0), 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 06:33:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-07-20 06:33:55,540 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 111 [2022-07-20 06:33:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:55,540 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-07-20 06:33:55,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:33:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-07-20 06:33:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-20 06:33:55,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:55,542 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:55,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 06:33:55,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:55,763 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1693145504, now seen corresponding path program 2 times [2022-07-20 06:33:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:55,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209140424] [2022-07-20 06:33:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:33:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:55,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:33:55,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209140424] [2022-07-20 06:33:55,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209140424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:33:55,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30511016] [2022-07-20 06:33:55,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:33:55,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:55,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:33:55,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:33:55,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 06:33:56,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:33:56,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:33:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 06:33:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:33:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:56,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:33:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-07-20 06:33:56,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30511016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:33:56,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:33:56,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-07-20 06:33:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803565976] [2022-07-20 06:33:56,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:33:56,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 06:33:56,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:33:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 06:33:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:33:56,146 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 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 06:33:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:33:56,199 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2022-07-20 06:33:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:33:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 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 123 [2022-07-20 06:33:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:33:56,200 INFO L225 Difference]: With dead ends: 161 [2022-07-20 06:33:56,200 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 06:33:56,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:33:56,201 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:33:56,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 199 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:33:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 06:33:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-07-20 06:33:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.0714285714285714) internal successors, (165), 160 states have internal predecessors, (165), 0 states have call successors, (0), 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 06:33:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-07-20 06:33:56,204 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 123 [2022-07-20 06:33:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:33:56,205 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-07-20 06:33:56,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 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 06:33:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-07-20 06:33:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 06:33:56,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:33:56,206 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:56,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 06:33:56,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:33:56,432 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-20 06:33:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:33:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766496, now seen corresponding path program 3 times [2022-07-20 06:33:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:33:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943752614] [2022-07-20 06:33:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:33:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:33:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 06:33:56,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 06:33:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 06:33:56,696 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 06:33:56,696 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 06:33:56,697 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2022-07-20 06:33:56,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2022-07-20 06:33:56,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2022-07-20 06:33:56,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2022-07-20 06:33:56,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2022-07-20 06:33:56,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2022-07-20 06:33:56,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2022-07-20 06:33:56,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2022-07-20 06:33:56,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2022-07-20 06:33:56,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2022-07-20 06:33:56,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2022-07-20 06:33:56,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 06:33:56,705 INFO L356 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:33:56,709 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 06:33:56,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:33:56 BoogieIcfgContainer [2022-07-20 06:33:56,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 06:33:56,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 06:33:56,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 06:33:56,794 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 06:33:56,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:35" (3/4) ... [2022-07-20 06:33:56,796 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-20 06:33:56,881 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-20 06:33:56,882 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 06:33:56,882 INFO L158 Benchmark]: Toolchain (without parser) took 21717.02ms. Allocated memory was 79.7MB in the beginning and 207.6MB in the end (delta: 127.9MB). Free memory was 45.1MB in the beginning and 155.6MB in the end (delta: -110.4MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,883 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 24.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:33:56,883 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.46ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 44.9MB in the beginning and 72.5MB in the end (delta: -27.7MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,884 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.99ms. Allocated memory is still 96.5MB. Free memory was 72.5MB in the beginning and 70.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,884 INFO L158 Benchmark]: Boogie Preprocessor took 25.25ms. Allocated memory is still 96.5MB. Free memory was 70.6MB in the beginning and 69.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,886 INFO L158 Benchmark]: RCFGBuilder took 431.21ms. Allocated memory is still 96.5MB. Free memory was 69.2MB in the beginning and 55.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,887 INFO L158 Benchmark]: TraceAbstraction took 20860.73ms. Allocated memory was 96.5MB in the beginning and 207.6MB in the end (delta: 111.1MB). Free memory was 55.1MB in the beginning and 166.1MB in the end (delta: -111.0MB). Peak memory consumption was 108.7MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,888 INFO L158 Benchmark]: Witness Printer took 88.48ms. Allocated memory is still 207.6MB. Free memory was 166.1MB in the beginning and 155.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-20 06:33:56,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 24.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.46ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 44.9MB in the beginning and 72.5MB in the end (delta: -27.7MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.99ms. Allocated memory is still 96.5MB. Free memory was 72.5MB in the beginning and 70.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.25ms. Allocated memory is still 96.5MB. Free memory was 70.6MB in the beginning and 69.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 431.21ms. Allocated memory is still 96.5MB. Free memory was 69.2MB in the beginning and 55.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 20860.73ms. Allocated memory was 96.5MB in the beginning and 207.6MB in the end (delta: 111.1MB). Free memory was 55.1MB in the beginning and 166.1MB in the end (delta: -111.0MB). Peak memory consumption was 108.7MB. Max. memory is 16.1GB. * Witness Printer took 88.48ms. Allocated memory is still 207.6MB. Free memory was 166.1MB in the beginning and 155.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] static int array[10]; [L17] static int numbers2[10]; [L36] static int numbers4[10]; VAL [array={2:0}, numbers2={3:0}, numbers4={4:0}] [L45] CALL getNumbers4() [L35] CALL, EXPR getNumbers3() [L25] CALL, EXPR getNumbers2() [L16] CALL, EXPR getNumbers() [L8] int i = 0; VAL [array={2:0}, i=0, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=0, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=0, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=1, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=1, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=1, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=2, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=2, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=2, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=3, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=3, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=3, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=4, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=4, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=4, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=5, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=5, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=5, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=6, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=6, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=6, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=7, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=7, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=7, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=8, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=8, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=8, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=9, numbers2={3:0}, numbers4={4:0}] [L8] COND TRUE i < 10 VAL [array={2:0}, i=9, numbers2={3:0}, numbers4={4:0}] [L9] array[i] = i VAL [array={2:0}, i=9, numbers2={3:0}, numbers4={4:0}] [L8] ++i VAL [array={2:0}, i=10, numbers2={3:0}, numbers4={4:0}] [L8] COND FALSE !(i < 10) VAL [array={2:0}, i=10, numbers2={3:0}, numbers4={4:0}] [L12] return array; VAL [\result={2:0}, array={2:0}, i=10, numbers2={3:0}, numbers4={4:0}] [L16] RET, EXPR getNumbers() [L16] int* numbers = getNumbers(); [L18] int i = 0; VAL [array={2:0}, i=0, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=0, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=0, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=0] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=0, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=0] [L18] ++i VAL [array={2:0}, i=1, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=1, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=1, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=1] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=1, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=1] [L18] ++i VAL [array={2:0}, i=2, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=2, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=2, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=2] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=2, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=2] [L18] ++i VAL [array={2:0}, i=3, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=3, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=3, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=3] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=3, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=3] [L18] ++i VAL [array={2:0}, i=4, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=4, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=4, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=4] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=4, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=4] [L18] ++i VAL [array={2:0}, i=5, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=5, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=5, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=5] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=5, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=5] [L18] ++i VAL [array={2:0}, i=6, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=6, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=6, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=6] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=6, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=6] [L18] ++i VAL [array={2:0}, i=7, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=7, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=7, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=7] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=7, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=7] [L18] ++i VAL [array={2:0}, i=8, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=8, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=8, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=8] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=8, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=8] [L18] ++i VAL [array={2:0}, i=9, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND TRUE i < 10 VAL [array={2:0}, i=9, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L19] EXPR numbers[i] VAL [array={2:0}, i=9, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=9] [L19] numbers2[i] = numbers[i] VAL [array={2:0}, i=9, numbers={2:0}, numbers2={3:0}, numbers4={4:0}, numbers[i]=9] [L18] ++i VAL [array={2:0}, i=10, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L18] COND FALSE !(i < 10) VAL [array={2:0}, i=10, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L21] return numbers2; VAL [\result={3:0}, array={2:0}, i=10, numbers={2:0}, numbers2={3:0}, numbers4={4:0}] [L25] RET, EXPR getNumbers2() [L25] int* numbers = getNumbers2(); [L26] int numbers3[10]; [L27] int i = 0; VAL [array={2:0}, i=0, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=0, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=0, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=0] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=0, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=0] [L27] ++i VAL [array={2:0}, i=1, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=1, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=1, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=1] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=1, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=1] [L27] ++i VAL [array={2:0}, i=2, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=2, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=2, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=2] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=2, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=2] [L27] ++i VAL [array={2:0}, i=3, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=3, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=3, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=3] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=3, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=3] [L27] ++i VAL [array={2:0}, i=4, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=4, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=4, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=4] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=4, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=4] [L27] ++i VAL [array={2:0}, i=5, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=5, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=5, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=5] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=5, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=5] [L27] ++i VAL [array={2:0}, i=6, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=6, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=6, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=6] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=6, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=6] [L27] ++i VAL [array={2:0}, i=7, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=7, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=7, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=7] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=7, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=7] [L27] ++i VAL [array={2:0}, i=8, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=8, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=8, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=8] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=8, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=8] [L27] ++i VAL [array={2:0}, i=9, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND TRUE i < 10 VAL [array={2:0}, i=9, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L28] EXPR numbers[i] VAL [array={2:0}, i=9, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=9] [L28] numbers3[i] = numbers[i] VAL [array={2:0}, i=9, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}, numbers[i]=9] [L27] ++i VAL [array={2:0}, i=10, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L27] COND FALSE !(i < 10) VAL [array={2:0}, i=10, numbers={3:0}, numbers2={3:0}, numbers3={11:0}, numbers4={4:0}] [L31] return numbers3; [L31] return numbers3; VAL [\result={11:0}, array={2:0}, i=10, numbers={3:0}, numbers2={3:0}, numbers4={4:0}] [L35] RET, EXPR getNumbers3() [L35] int* numbers = getNumbers3(); [L37] int i = 0; VAL [array={2:0}, i=0, numbers={11:0}, numbers2={3:0}, numbers4={4:0}] [L37] COND TRUE i < 10 VAL [array={2:0}, i=0, numbers={11:0}, numbers2={3:0}, numbers4={4:0}] [L38] numbers[i] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 43]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 20.7s, OverallIterations: 25, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3212 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3212 mSDsluCounter, 3127 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 29 IncrementalHoareTripleChecker+Unchecked, 2249 mSDsCounter, 392 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2754 IncrementalHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 392 mSolverCounterUnsat, 878 mSDtfsCounter, 2754 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2099 GetRequests, 1769 SyntacticMatches, 2 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=24, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 89 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 2742 NumberOfCodeBlocks, 2490 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 3372 ConstructedInterpolants, 87 QuantifiedInterpolants, 28390 SizeOfPredicates, 34 NumberOfNonLiveVariables, 3619 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 51 InterpolantComputations, 12 PerfectInterpolantSequences, 11661/12711 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-20 06:33:56,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)