./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:22:33,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:22:33,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:22:33,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:22:33,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:22:33,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:22:33,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:22:33,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:22:33,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:22:33,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:22:33,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:22:33,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:22:33,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:22:33,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:22:33,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:22:33,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:22:33,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:22:33,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:22:33,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:22:33,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:22:33,327 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:22:33,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:22:33,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:22:33,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:22:33,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:22:33,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:22:33,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:22:33,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:22:33,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:22:33,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:22:33,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:22:33,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:22:33,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:22:33,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:22:33,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:22:33,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:22:33,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:22:33,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:22:33,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:22:33,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:22:33,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:22:33,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:22:33,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:22:33,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:22:33,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:22:33,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:22:33,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:22:33,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:22:33,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:22:33,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:22:33,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:22:33,352 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:22:33,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:22:33,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:22:33,352 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:22:33,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:22:33,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:22:33,354 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:22:33,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:22:33,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:22:33,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:22:33,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:22:33,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:22:33,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:22:33,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:22:33,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:22:33,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:22:33,355 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2022-07-12 18:22:33,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:22:33,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:22:33,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:22:33,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:22:33,550 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:22:33,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2022-07-12 18:22:33,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2833052df/60ef4c376faa44a79b87babad305e2d6/FLAG5c8c916fd [2022-07-12 18:22:33,961 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:22:33,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2022-07-12 18:22:33,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2833052df/60ef4c376faa44a79b87babad305e2d6/FLAG5c8c916fd [2022-07-12 18:22:34,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2833052df/60ef4c376faa44a79b87babad305e2d6 [2022-07-12 18:22:34,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:22:34,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:22:34,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:22:34,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:22:34,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:22:34,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1449141d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34, skipping insertion in model container [2022-07-12 18:22:34,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:22:34,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:22:34,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:22:34,624 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:22:34,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:22:34,669 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:22:34,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34 WrapperNode [2022-07-12 18:22:34,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:22:34,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:22:34,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:22:34,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:22:34,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,698 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-07-12 18:22:34,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:22:34,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:22:34,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:22:34,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:22:34,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:22:34,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:22:34,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:22:34,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:22:34,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (1/1) ... [2022-07-12 18:22:34,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:22:34,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:34,748 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) [2022-07-12 18:22:34,754 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 [2022-07-12 18:22:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:22:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:22:34,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:22:34,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:22:34,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:22:34,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:22:34,851 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:22:34,853 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:22:35,052 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:22:35,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:22:35,057 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:22:35,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:22:35 BoogieIcfgContainer [2022-07-12 18:22:35,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:22:35,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:22:35,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:22:35,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:22:35,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:22:34" (1/3) ... [2022-07-12 18:22:35,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5179efc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:22:35, skipping insertion in model container [2022-07-12 18:22:35,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:22:34" (2/3) ... [2022-07-12 18:22:35,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5179efc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:22:35, skipping insertion in model container [2022-07-12 18:22:35,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:22:35" (3/3) ... [2022-07-12 18:22:35,077 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2022-07-12 18:22:35,087 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:22:35,088 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-12 18:22:35,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:22:35,132 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@6cfe5fbe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@10d31812 [2022-07-12 18:22:35,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-12 18:22:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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) [2022-07-12 18:22:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:22:35,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2022-07-12 18:22:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137535013] [2022-07-12 18:22:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137535013] [2022-07-12 18:22:35,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137535013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080116705] [2022-07-12 18:22:35,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:35,339 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,464 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-07-12 18:22:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:35,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:22:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,474 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:22:35,474 INFO L226 Difference]: Without dead ends: 121 [2022-07-12 18:22:35,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:35,479 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-12 18:22:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2022-07-12 18:22:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-12 18:22:35,507 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2022-07-12 18:22:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,508 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-12 18:22:35,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-12 18:22:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:22:35,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:22:35,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2022-07-12 18:22:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744979122] [2022-07-12 18:22:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744979122] [2022-07-12 18:22:35,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744979122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:22:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54319381] [2022-07-12 18:22:35,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:22:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:22:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:22:35,549 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,572 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-07-12 18:22:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:22:35,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:22:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,575 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:22:35,575 INFO L226 Difference]: Without dead ends: 46 [2022-07-12 18:22:35,578 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 [2022-07-12 18:22:35,579 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-12 18:22:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-07-12 18:22:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.75) internal successors, (49), 42 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) [2022-07-12 18:22:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-12 18:22:35,590 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-07-12 18:22:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,590 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-12 18:22:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-12 18:22:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:22:35,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:22:35,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-12 18:22:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067030290] [2022-07-12 18:22:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067030290] [2022-07-12 18:22:35,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067030290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060602413] [2022-07-12 18:22:35,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,662 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,687 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-07-12 18:22:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:22:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,689 INFO L225 Difference]: With dead ends: 78 [2022-07-12 18:22:35,689 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 18:22:35,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,694 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 18:22:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2022-07-12 18:22:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-12 18:22:35,702 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2022-07-12 18:22:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,703 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-12 18:22:35,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-12 18:22:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:22:35,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:22:35,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-12 18:22:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245196382] [2022-07-12 18:22:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245196382] [2022-07-12 18:22:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245196382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:35,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793490276] [2022-07-12 18:22:35,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:35,759 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,804 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-07-12 18:22:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:35,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:22:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,806 INFO L225 Difference]: With dead ends: 84 [2022-07-12 18:22:35,806 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 18:22:35,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:35,811 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 18:22:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2022-07-12 18:22:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-12 18:22:35,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2022-07-12 18:22:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,818 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-12 18:22:35,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-12 18:22:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:22:35,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:22:35,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2022-07-12 18:22:35,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272509934] [2022-07-12 18:22:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272509934] [2022-07-12 18:22:35,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272509934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:22:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251499154] [2022-07-12 18:22:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:22:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:22:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:22:35,886 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,903 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-07-12 18:22:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:22:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:22:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,904 INFO L225 Difference]: With dead ends: 45 [2022-07-12 18:22:35,904 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:22:35,904 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 [2022-07-12 18:22:35,904 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 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 [2022-07-12 18:22:35,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:22:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 18:22:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-07-12 18:22:35,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2022-07-12 18:22:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:35,907 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-07-12 18:22:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-07-12 18:22:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:22:35,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:35,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:22:35,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2022-07-12 18:22:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:35,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313011513] [2022-07-12 18:22:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:35,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313011513] [2022-07-12 18:22:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313011513] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:35,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:35,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:35,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766037503] [2022-07-12 18:22:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:35,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:35,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:35,948 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:35,996 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2022-07-12 18:22:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:22:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:35,998 INFO L225 Difference]: With dead ends: 79 [2022-07-12 18:22:35,998 INFO L226 Difference]: Without dead ends: 79 [2022-07-12 18:22:35,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:35,998 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:35,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-12 18:22:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2022-07-12 18:22:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 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) [2022-07-12 18:22:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-12 18:22:36,001 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2022-07-12 18:22:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,001 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-12 18:22:36,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-12 18:22:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:22:36,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:22:36,002 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2022-07-12 18:22:36,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822595414] [2022-07-12 18:22:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822595414] [2022-07-12 18:22:36,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822595414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:36,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127894384] [2022-07-12 18:22:36,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:36,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,050 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-07-12 18:22:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,085 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-07-12 18:22:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 10 [2022-07-12 18:22:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,086 INFO L225 Difference]: With dead ends: 46 [2022-07-12 18:22:36,086 INFO L226 Difference]: Without dead ends: 46 [2022-07-12 18:22:36,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,087 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-12 18:22:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-12 18:22:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-12 18:22:36,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2022-07-12 18:22:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,090 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-12 18:22:36,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-07-12 18:22:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-12 18:22:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:22:36,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 18:22:36,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2022-07-12 18:22:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461583375] [2022-07-12 18:22:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461583375] [2022-07-12 18:22:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461583375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521207775] [2022-07-12 18:22:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:36,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,114 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 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) [2022-07-12 18:22:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,125 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-07-12 18:22:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 10 [2022-07-12 18:22:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,126 INFO L225 Difference]: With dead ends: 80 [2022-07-12 18:22:36,126 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 18:22:36,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:36,127 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 18:22:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2022-07-12 18:22:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-12 18:22:36,129 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2022-07-12 18:22:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,129 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-12 18:22:36,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-07-12 18:22:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-12 18:22:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:22:36,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:22:36,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2022-07-12 18:22:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389955723] [2022-07-12 18:22:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389955723] [2022-07-12 18:22:36,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389955723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:22:36,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226038789] [2022-07-12 18:22:36,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:22:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:22:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:22:36,147 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-07-12 18:22:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,162 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-12 18:22:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:22:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 10 [2022-07-12 18:22:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,163 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:22:36,163 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:22:36,163 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 [2022-07-12 18:22:36,164 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:22:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-12 18:22:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.488888888888889) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-12 18:22:36,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2022-07-12 18:22:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,166 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-12 18:22:36,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-07-12 18:22:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-12 18:22:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:22:36,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:22:36,167 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2022-07-12 18:22:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965255711] [2022-07-12 18:22:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965255711] [2022-07-12 18:22:36,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965255711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:22:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422094633] [2022-07-12 18:22:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:22:36,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:22:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:36,200 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-07-12 18:22:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,251 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2022-07-12 18:22:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:22:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 10 [2022-07-12 18:22:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,252 INFO L225 Difference]: With dead ends: 107 [2022-07-12 18:22:36,252 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 18:22:36,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:22:36,253 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 18:22:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2022-07-12 18:22:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-12 18:22:36,255 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2022-07-12 18:22:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,256 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-12 18:22:36,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-07-12 18:22:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-12 18:22:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:22:36,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:22:36,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2022-07-12 18:22:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188420290] [2022-07-12 18:22:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188420290] [2022-07-12 18:22:36,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188420290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960021881] [2022-07-12 18:22:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:22:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:22:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:36,303 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2022-07-12 18:22:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,371 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-07-12 18:22:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:22:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 10 [2022-07-12 18:22:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,372 INFO L225 Difference]: With dead ends: 81 [2022-07-12 18:22:36,372 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 18:22:36,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:36,373 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 18:22:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-07-12 18:22:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.5) internal successors, (72), 57 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) [2022-07-12 18:22:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-07-12 18:22:36,375 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2022-07-12 18:22:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,375 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-07-12 18:22:36,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2022-07-12 18:22:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-07-12 18:22:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:22:36,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 18:22:36,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,377 INFO L85 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2022-07-12 18:22:36,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633683788] [2022-07-12 18:22:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633683788] [2022-07-12 18:22:36,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633683788] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:36,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845401962] [2022-07-12 18:22:36,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:36,418 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2022-07-12 18:22:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,457 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-07-12 18:22:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:22:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,458 INFO L225 Difference]: With dead ends: 83 [2022-07-12 18:22:36,458 INFO L226 Difference]: Without dead ends: 83 [2022-07-12 18:22:36,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:36,458 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-12 18:22:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2022-07-12 18:22:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-07-12 18:22:36,461 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2022-07-12 18:22:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,461 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-07-12 18:22:36,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2022-07-12 18:22:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-07-12 18:22:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:22:36,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 18:22:36,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2022-07-12 18:22:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833354962] [2022-07-12 18:22:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833354962] [2022-07-12 18:22:36,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833354962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:36,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:36,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:36,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985640170] [2022-07-12 18:22:36,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:36,496 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2022-07-12 18:22:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,522 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-07-12 18:22:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:22:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,523 INFO L225 Difference]: With dead ends: 63 [2022-07-12 18:22:36,523 INFO L226 Difference]: Without dead ends: 63 [2022-07-12 18:22:36,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:36,524 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-12 18:22:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-07-12 18:22:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-12 18:22:36,526 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2022-07-12 18:22:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,526 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-12 18:22:36,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2022-07-12 18:22:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-12 18:22:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:22:36,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,527 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 18:22:36,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2022-07-12 18:22:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:36,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817711568] [2022-07-12 18:22:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817711568] [2022-07-12 18:22:36,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817711568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018535559] [2022-07-12 18:22:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:36,570 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) [2022-07-12 18:22:36,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:22:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:36,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:22:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:22:36,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:36,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:36,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018535559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:36,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:36,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-12 18:22:36,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695460697] [2022-07-12 18:22:36,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:36,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:22:36,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:22:36,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:22:36,879 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:36,985 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2022-07-12 18:22:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:22:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:22:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:36,986 INFO L225 Difference]: With dead ends: 122 [2022-07-12 18:22:36,986 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 18:22:36,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:36,987 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 266 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:36,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 184 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 18:22:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2022-07-12 18:22:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 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) [2022-07-12 18:22:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-07-12 18:22:36,989 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2022-07-12 18:22:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:36,989 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-07-12 18:22:36,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-07-12 18:22:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:22:36,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:36,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 18:22:37,201 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2022-07-12 18:22:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412717488] [2022-07-12 18:22:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:37,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412717488] [2022-07-12 18:22:37,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412717488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:37,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:37,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512719514] [2022-07-12 18:22:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:37,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:37,222 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:37,245 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-07-12 18:22:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:37,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 18:22:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:37,246 INFO L225 Difference]: With dead ends: 51 [2022-07-12 18:22:37,246 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 18:22:37,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:37,247 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:37,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 18:22:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-12 18:22:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 50 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) [2022-07-12 18:22:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-07-12 18:22:37,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2022-07-12 18:22:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:37,265 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-07-12 18:22:37,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-07-12 18:22:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:22:37,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:37,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 18:22:37,266 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2022-07-12 18:22:37,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:37,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312322810] [2022-07-12 18:22:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:37,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312322810] [2022-07-12 18:22:37,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312322810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:37,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:37,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848294843] [2022-07-12 18:22:37,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:22:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:22:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:37,316 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:37,358 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-12 18:22:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 18:22:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:37,359 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:22:37,359 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:22:37,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:22:37,360 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:37,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 65 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:22:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-12 18:22:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 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) [2022-07-12 18:22:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-07-12 18:22:37,362 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2022-07-12 18:22:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:37,362 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-07-12 18:22:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-07-12 18:22:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:22:37,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:37,364 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 18:22:37,365 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2022-07-12 18:22:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134124956] [2022-07-12 18:22:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134124956] [2022-07-12 18:22:37,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134124956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432177030] [2022-07-12 18:22:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:37,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:37,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:37,426 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) [2022-07-12 18:22:37,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:22:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:22:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:37,530 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:37,530 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:37,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432177030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:37,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:37,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-07-12 18:22:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075802249] [2022-07-12 18:22:37,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:22:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:22:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:37,700 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:37,847 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-12 18:22:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:22:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:22:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:37,848 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:22:37,848 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:22:37,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:22:37,849 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:37,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 164 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:22:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2022-07-12 18:22:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-12 18:22:37,853 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2022-07-12 18:22:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:37,853 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-12 18:22:37,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-12 18:22:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:22:37,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:37,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:37,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:38,072 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,SelfDestructingSolverStorable16 [2022-07-12 18:22:38,073 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2022-07-12 18:22:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55132713] [2022-07-12 18:22:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55132713] [2022-07-12 18:22:38,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55132713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:22:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296559535] [2022-07-12 18:22:38,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:22:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:22:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:38,101 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,128 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-07-12 18:22:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:22:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 18:22:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,129 INFO L225 Difference]: With dead ends: 48 [2022-07-12 18:22:38,129 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 18:22:38,129 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 [2022-07-12 18:22:38,130 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 18:22:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-12 18:22:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-07-12 18:22:38,131 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2022-07-12 18:22:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,132 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-07-12 18:22:38,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-07-12 18:22:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:22:38,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 18:22:38,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2022-07-12 18:22:38,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065503841] [2022-07-12 18:22:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065503841] [2022-07-12 18:22:38,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065503841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:38,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:22:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500277239] [2022-07-12 18:22:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:22:38,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:22:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:22:38,180 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,226 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-07-12 18:22:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:22:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 18:22:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,226 INFO L225 Difference]: With dead ends: 54 [2022-07-12 18:22:38,226 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 18:22:38,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:22:38,227 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 18:22:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-07-12 18:22:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-12 18:22:38,229 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2022-07-12 18:22:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,229 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-12 18:22:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-12 18:22:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:22:38,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 18:22:38,230 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2022-07-12 18:22:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146208516] [2022-07-12 18:22:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146208516] [2022-07-12 18:22:38,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146208516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434937143] [2022-07-12 18:22:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:38,292 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) [2022-07-12 18:22:38,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:22:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:22:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:38,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:22:38,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:22:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:22:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434937143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:38,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:22:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-07-12 18:22:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769718636] [2022-07-12 18:22:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:22:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:22:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:22:38,436 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,481 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2022-07-12 18:22:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:22:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 18:22:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,482 INFO L225 Difference]: With dead ends: 75 [2022-07-12 18:22:38,482 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 18:22:38,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:22:38,482 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 178 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 18:22:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2022-07-12 18:22:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-12 18:22:38,484 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 16 [2022-07-12 18:22:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,484 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-12 18:22:38,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-12 18:22:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 18:22:38,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:38,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 18:22:38,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:38,695 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash 876377546, now seen corresponding path program 1 times [2022-07-12 18:22:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:38,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583137097] [2022-07-12 18:22:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583137097] [2022-07-12 18:22:38,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583137097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566430576] [2022-07-12 18:22:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:38,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:38,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:38,748 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) [2022-07-12 18:22:38,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:22:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:22:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:38,825 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:38,825 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:38,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566430576] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:38,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:38,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-07-12 18:22:38,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788509983] [2022-07-12 18:22:38,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:38,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:22:38,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:22:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:38,929 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) 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) [2022-07-12 18:22:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:38,995 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-07-12 18:22:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:22:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) 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 16 [2022-07-12 18:22:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:38,996 INFO L225 Difference]: With dead ends: 76 [2022-07-12 18:22:38,996 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:22:38,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:22:38,996 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:38,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 121 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:22:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2022-07-12 18:22:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-07-12 18:22:38,998 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 16 [2022-07-12 18:22:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:38,998 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-07-12 18:22:38,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) 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) [2022-07-12 18:22:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-07-12 18:22:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:22:38,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:38,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:39,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:39,216 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2022-07-12 18:22:39,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619245070] [2022-07-12 18:22:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619245070] [2022-07-12 18:22:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619245070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958795076] [2022-07-12 18:22:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:39,238 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,271 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-07-12 18:22:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-07-12 18:22:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,273 INFO L225 Difference]: With dead ends: 61 [2022-07-12 18:22:39,273 INFO L226 Difference]: Without dead ends: 61 [2022-07-12 18:22:39,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:22:39,274 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-12 18:22:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-12 18:22:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.263157894736842) internal successors, (72), 60 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) [2022-07-12 18:22:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-07-12 18:22:39,275 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2022-07-12 18:22:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,275 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-07-12 18:22:39,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-07-12 18:22:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:22:39,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 18:22:39,276 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2022-07-12 18:22:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095639005] [2022-07-12 18:22:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095639005] [2022-07-12 18:22:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095639005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:22:39,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13252695] [2022-07-12 18:22:39,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:22:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:22:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:22:39,323 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,359 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-12 18:22:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:22:39,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-07-12 18:22:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,360 INFO L225 Difference]: With dead ends: 65 [2022-07-12 18:22:39,360 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 18:22:39,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:39,360 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 18:22:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-12 18:22:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.25) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-07-12 18:22:39,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 17 [2022-07-12 18:22:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,362 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-07-12 18:22:39,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-07-12 18:22:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:22:39,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 18:22:39,362 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 2 times [2022-07-12 18:22:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018249171] [2022-07-12 18:22:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:39,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018249171] [2022-07-12 18:22:39,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018249171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:22:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991774265] [2022-07-12 18:22:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:22:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:22:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:39,459 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-07-12 18:22:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,571 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-07-12 18:22:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:22:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 19 [2022-07-12 18:22:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,572 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:22:39,572 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:22:39,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:22:39,573 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 109 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 160 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:22:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2022-07-12 18:22:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-12 18:22:39,575 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2022-07-12 18:22:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,575 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-12 18:22:39,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-07-12 18:22:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-12 18:22:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:22:39,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 18:22:39,576 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2022-07-12 18:22:39,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258226091] [2022-07-12 18:22:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:39,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258226091] [2022-07-12 18:22:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258226091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:22:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277873763] [2022-07-12 18:22:39,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:22:39,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:22:39,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:39,645 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-07-12 18:22:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,719 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-07-12 18:22:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:22:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 19 [2022-07-12 18:22:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,720 INFO L225 Difference]: With dead ends: 82 [2022-07-12 18:22:39,720 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 18:22:39,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:39,735 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 18:22:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2022-07-12 18:22:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-12 18:22:39,737 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2022-07-12 18:22:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,737 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-12 18:22:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-07-12 18:22:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-12 18:22:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:22:39,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 18:22:39,738 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2022-07-12 18:22:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612533534] [2022-07-12 18:22:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612533534] [2022-07-12 18:22:39,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612533534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:22:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186037593] [2022-07-12 18:22:39,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:22:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:22:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:22:39,804 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:39,855 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2022-07-12 18:22:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:22:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:22:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:39,856 INFO L225 Difference]: With dead ends: 100 [2022-07-12 18:22:39,856 INFO L226 Difference]: Without dead ends: 100 [2022-07-12 18:22:39,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:22:39,857 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:39,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 190 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-12 18:22:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-07-12 18:22:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-07-12 18:22:39,859 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 20 [2022-07-12 18:22:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:39,859 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-07-12 18:22:39,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-07-12 18:22:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:22:39,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:39,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 18:22:39,860 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2022-07-12 18:22:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:39,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351079523] [2022-07-12 18:22:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:39,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351079523] [2022-07-12 18:22:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351079523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:39,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:39,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 18:22:39,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42003815] [2022-07-12 18:22:39,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:39,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:22:39,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:22:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:22:39,964 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:40,138 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2022-07-12 18:22:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:22:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:22:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:40,139 INFO L225 Difference]: With dead ends: 122 [2022-07-12 18:22:40,139 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 18:22:40,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:22:40,141 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:40,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 200 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 18:22:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2022-07-12 18:22:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-07-12 18:22:40,143 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 20 [2022-07-12 18:22:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:40,143 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-07-12 18:22:40,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-07-12 18:22:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:22:40,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:40,143 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:40,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 18:22:40,144 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2022-07-12 18:22:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:40,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543686639] [2022-07-12 18:22:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:40,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:40,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543686639] [2022-07-12 18:22:40,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543686639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:40,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:40,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:22:40,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958314578] [2022-07-12 18:22:40,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:40,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:22:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:22:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:22:40,309 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:40,544 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2022-07-12 18:22:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:22:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:22:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:40,545 INFO L225 Difference]: With dead ends: 146 [2022-07-12 18:22:40,545 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 18:22:40,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:22:40,546 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:40,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 194 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 18:22:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2022-07-12 18:22:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.27) internal successors, (127), 103 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-07-12 18:22:40,551 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 20 [2022-07-12 18:22:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:40,551 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-07-12 18:22:40,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-07-12 18:22:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:22:40,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:40,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 18:22:40,553 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2022-07-12 18:22:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:40,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006882744] [2022-07-12 18:22:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006882744] [2022-07-12 18:22:40,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006882744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:40,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:40,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:22:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167630214] [2022-07-12 18:22:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:22:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:22:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:40,602 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:40,613 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-07-12 18:22:40,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:22:40,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 18:22:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:40,614 INFO L225 Difference]: With dead ends: 103 [2022-07-12 18:22:40,614 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:22:40,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:22:40,617 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 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, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:40,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:22:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-12 18:22:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-07-12 18:22:40,619 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 21 [2022-07-12 18:22:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:40,620 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-07-12 18:22:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-07-12 18:22:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:22:40,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:40,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 18:22:40,621 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2022-07-12 18:22:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:40,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558368365] [2022-07-12 18:22:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558368365] [2022-07-12 18:22:40,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558368365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790985299] [2022-07-12 18:22:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:40,696 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) [2022-07-12 18:22:40,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:22:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:22:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:40,766 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:40,766 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:40,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:41,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790985299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:41,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:41,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-07-12 18:22:41,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740972915] [2022-07-12 18:22:41,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:41,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:22:41,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:41,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:22:41,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:22:41,003 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:41,310 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2022-07-12 18:22:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:22:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-12 18:22:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:41,311 INFO L225 Difference]: With dead ends: 129 [2022-07-12 18:22:41,311 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 18:22:41,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:22:41,312 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 229 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:41,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 200 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 18:22:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2022-07-12 18:22:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-07-12 18:22:41,313 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2022-07-12 18:22:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:41,313 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-07-12 18:22:41,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-07-12 18:22:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:22:41,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:41,314 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:41,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:41,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:41,514 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:41,515 INFO L85 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2022-07-12 18:22:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:41,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565387590] [2022-07-12 18:22:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:41,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:41,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565387590] [2022-07-12 18:22:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565387590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143231540] [2022-07-12 18:22:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:41,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:41,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:41,592 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) [2022-07-12 18:22:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:22:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:22:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:41,659 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:41,659 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:41,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:41,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143231540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:41,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:41,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-12 18:22:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887559319] [2022-07-12 18:22:41,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:22:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:22:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:22:41,916 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:42,399 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2022-07-12 18:22:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:22:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:22:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:42,400 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:22:42,400 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 18:22:42,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:22:42,400 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 406 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:42,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 139 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:22:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 18:22:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2022-07-12 18:22:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1875) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2022-07-12 18:22:42,402 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 24 [2022-07-12 18:22:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:42,403 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2022-07-12 18:22:42,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2022-07-12 18:22:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:22:42,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:42,403 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:42,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 18:22:42,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:42,611 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2022-07-12 18:22:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912010874] [2022-07-12 18:22:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:42,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912010874] [2022-07-12 18:22:42,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912010874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41359900] [2022-07-12 18:22:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:42,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:42,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:42,736 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) [2022-07-12 18:22:42,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:22:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:22:42,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:22:42,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:42,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:42,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:43,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41359900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:43,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:43,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-07-12 18:22:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867152392] [2022-07-12 18:22:43,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:43,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:22:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:22:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:22:43,082 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 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) [2022-07-12 18:22:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:43,403 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2022-07-12 18:22:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:22:43,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 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) Word has length 24 [2022-07-12 18:22:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:43,404 INFO L225 Difference]: With dead ends: 141 [2022-07-12 18:22:43,404 INFO L226 Difference]: Without dead ends: 141 [2022-07-12 18:22:43,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:22:43,405 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 164 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:43,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 271 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:22:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-12 18:22:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2022-07-12 18:22:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-07-12 18:22:43,411 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 24 [2022-07-12 18:22:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:43,411 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-07-12 18:22:43,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 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) [2022-07-12 18:22:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-07-12 18:22:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:22:43,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:43,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:43,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:43,623 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2022-07-12 18:22:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153223782] [2022-07-12 18:22:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:43,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153223782] [2022-07-12 18:22:43,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153223782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:43,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730032071] [2022-07-12 18:22:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:22:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:43,739 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) [2022-07-12 18:22:43,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:22:43,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:22:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:22:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:43,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:22:43,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:22:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:43,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:44,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:22:44,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:22:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:44,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730032071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:44,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:44,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-07-12 18:22:44,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539853027] [2022-07-12 18:22:44,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:44,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 18:22:44,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 18:22:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:22:44,185 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-07-12 18:22:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:44,365 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-07-12 18:22:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:22:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) Word has length 26 [2022-07-12 18:22:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:44,366 INFO L225 Difference]: With dead ends: 178 [2022-07-12 18:22:44,366 INFO L226 Difference]: Without dead ends: 170 [2022-07-12 18:22:44,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:22:44,366 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:44,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 379 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-12 18:22:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-12 18:22:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2022-07-12 18:22:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2022-07-12 18:22:44,368 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 26 [2022-07-12 18:22:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:44,369 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2022-07-12 18:22:44,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2022-07-12 18:22:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2022-07-12 18:22:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:22:44,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:44,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:44,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:44,569 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,SelfDestructingSolverStorable32 [2022-07-12 18:22:44,570 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1149798068, now seen corresponding path program 1 times [2022-07-12 18:22:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:44,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405399039] [2022-07-12 18:22:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:22:44,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405399039] [2022-07-12 18:22:44,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405399039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:22:44,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:22:44,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:22:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403490606] [2022-07-12 18:22:44,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:22:44,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:22:44,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:22:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:22:44,652 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:44,729 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2022-07-12 18:22:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:22:44,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:22:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:44,730 INFO L225 Difference]: With dead ends: 156 [2022-07-12 18:22:44,730 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 18:22:44,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:22:44,731 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:44,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 136 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:22:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 18:22:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2022-07-12 18:22:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 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) [2022-07-12 18:22:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-07-12 18:22:44,733 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 27 [2022-07-12 18:22:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:44,733 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-07-12 18:22:44,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-07-12 18:22:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:22:44,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:44,733 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:44,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 18:22:44,733 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2022-07-12 18:22:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:44,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129137136] [2022-07-12 18:22:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:44,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:44,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:44,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129137136] [2022-07-12 18:22:44,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129137136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:44,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159002460] [2022-07-12 18:22:44,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:22:44,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:44,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:44,895 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) [2022-07-12 18:22:44,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:22:44,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:22:44,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:22:44,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:44,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:45,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:22:45,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:22:45,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:22:45,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:22:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:45,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:45,177 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:22:45,190 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:22:45,203 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_400) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-12 18:22:45,225 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:45,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:22:45,230 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:45,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:22:45,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:22:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-12 18:22:45,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159002460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:45,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:45,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-07-12 18:22:45,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819996373] [2022-07-12 18:22:45,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:22:45,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:22:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=435, Unknown=3, NotChecked=132, Total=650 [2022-07-12 18:22:45,347 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-07-12 18:22:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:45,547 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-07-12 18:22:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:22:45,547 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-12 18:22:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:45,548 INFO L225 Difference]: With dead ends: 187 [2022-07-12 18:22:45,548 INFO L226 Difference]: Without dead ends: 157 [2022-07-12 18:22:45,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=651, Unknown=3, NotChecked=162, Total=930 [2022-07-12 18:22:45,548 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:45,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 306 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-07-12 18:22:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-12 18:22:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2022-07-12 18:22:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 147 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2022-07-12 18:22:45,550 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 28 [2022-07-12 18:22:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:45,550 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2022-07-12 18:22:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-07-12 18:22:45,550 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2022-07-12 18:22:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:22:45,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:45,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:45,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 18:22:45,755 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,SelfDestructingSolverStorable34 [2022-07-12 18:22:45,755 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2022-07-12 18:22:45,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584814594] [2022-07-12 18:22:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:45,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584814594] [2022-07-12 18:22:45,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584814594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:45,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050434906] [2022-07-12 18:22:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:22:45,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:45,888 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) [2022-07-12 18:22:45,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:22:45,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:22:45,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:22:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:46,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:22:46,180 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:46,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:22:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:46,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:46,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-12 18:22:46,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-12 18:22:46,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-07-12 18:22:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:46,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050434906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:46,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:46,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-07-12 18:22:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804736396] [2022-07-12 18:22:46,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:46,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 18:22:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 18:22:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:22:46,536 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:46,826 INFO L93 Difference]: Finished difference Result 192 states and 215 transitions. [2022-07-12 18:22:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:22:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 18:22:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:46,827 INFO L225 Difference]: With dead ends: 192 [2022-07-12 18:22:46,827 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 18:22:46,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:22:46,828 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 126 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:46,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 293 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 327 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-07-12 18:22:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 18:22:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2022-07-12 18:22:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 154 states have (on average 1.155844155844156) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2022-07-12 18:22:46,831 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 30 [2022-07-12 18:22:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:46,831 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2022-07-12 18:22:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2022-07-12 18:22:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:22:46,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:46,831 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:46,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:47,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-12 18:22:47,032 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2022-07-12 18:22:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:47,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125674376] [2022-07-12 18:22:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125674376] [2022-07-12 18:22:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125674376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421442337] [2022-07-12 18:22:47,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:22:47,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:47,130 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) [2022-07-12 18:22:47,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:22:47,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:22:47,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:47,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:22:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:47,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:47,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-12 18:22:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:47,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421442337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:47,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:47,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-12 18:22:47,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944267796] [2022-07-12 18:22:47,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:47,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:22:47,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:47,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:22:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:22:47,478 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 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) [2022-07-12 18:22:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:47,820 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-07-12 18:22:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:22:47,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 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 32 [2022-07-12 18:22:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:47,821 INFO L225 Difference]: With dead ends: 169 [2022-07-12 18:22:47,821 INFO L226 Difference]: Without dead ends: 169 [2022-07-12 18:22:47,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:22:47,822 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:47,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 466 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:22:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-12 18:22:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2022-07-12 18:22:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.150943396226415) internal successors, (183), 161 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2022-07-12 18:22:47,849 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 32 [2022-07-12 18:22:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:47,849 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2022-07-12 18:22:47,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 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) [2022-07-12 18:22:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2022-07-12 18:22:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:22:47,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:47,850 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:47,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:48,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 18:22:48,059 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2022-07-12 18:22:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170241339] [2022-07-12 18:22:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:48,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170241339] [2022-07-12 18:22:48,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170241339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820384145] [2022-07-12 18:22:48,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:22:48,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:48,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:48,212 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) [2022-07-12 18:22:48,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:22:48,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:22:48,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 18:22:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:48,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:22:48,634 INFO L356 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2022-07-12 18:22:48,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-07-12 18:22:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:48,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-07-12 18:22:48,780 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-12 18:22:48,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 60 [2022-07-12 18:22:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:22:48,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820384145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:48,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:48,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 35 [2022-07-12 18:22:48,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683264063] [2022-07-12 18:22:48,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:48,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:22:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:22:48,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:22:48,892 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2022-07-12 18:22:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:49,456 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2022-07-12 18:22:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:22:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 33 [2022-07-12 18:22:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:49,458 INFO L225 Difference]: With dead ends: 218 [2022-07-12 18:22:49,458 INFO L226 Difference]: Without dead ends: 207 [2022-07-12 18:22:49,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=2637, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:22:49,459 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:49,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 332 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 299 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-07-12 18:22:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-12 18:22:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2022-07-12 18:22:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 193 states have (on average 1.145077720207254) internal successors, (221), 195 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2022-07-12 18:22:49,463 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 33 [2022-07-12 18:22:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:49,463 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2022-07-12 18:22:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2022-07-12 18:22:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2022-07-12 18:22:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:22:49,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:49,464 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:49,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:49,665 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,SelfDestructingSolverStorable37 [2022-07-12 18:22:49,666 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:49,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 1 times [2022-07-12 18:22:49,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:49,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028781166] [2022-07-12 18:22:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:49,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028781166] [2022-07-12 18:22:49,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028781166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441598357] [2022-07-12 18:22:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:49,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:49,816 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) [2022-07-12 18:22:49,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:22:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:22:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:49,899 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:49,900 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:50,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:50,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441598357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:50,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:50,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-07-12 18:22:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425112755] [2022-07-12 18:22:50,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:50,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 18:22:50,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 18:22:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:22:50,278 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:50,895 INFO L93 Difference]: Finished difference Result 227 states and 249 transitions. [2022-07-12 18:22:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:22:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 18:22:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:50,896 INFO L225 Difference]: With dead ends: 227 [2022-07-12 18:22:50,897 INFO L226 Difference]: Without dead ends: 227 [2022-07-12 18:22:50,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 18:22:50,897 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 395 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:50,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 230 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:22:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-12 18:22:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2022-07-12 18:22:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2022-07-12 18:22:50,901 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 33 [2022-07-12 18:22:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:50,901 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2022-07-12 18:22:50,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2022-07-12 18:22:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:22:50,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:50,901 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:50,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:51,101 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,SelfDestructingSolverStorable38 [2022-07-12 18:22:51,102 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2022-07-12 18:22:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799415768] [2022-07-12 18:22:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:51,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799415768] [2022-07-12 18:22:51,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799415768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657553654] [2022-07-12 18:22:51,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:22:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:51,449 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) [2022-07-12 18:22:51,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:22:51,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:22:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:22:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:51,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:22:51,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:22:51,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:22:51,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:22:51,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:22:51,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:22:52,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:22:52,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-12 18:22:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:52,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:54,180 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:54,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-12 18:22:54,186 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:22:54,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-12 18:22:54,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-12 18:22:54,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:22:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:54,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657553654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:54,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:22:54,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 42 [2022-07-12 18:22:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521039125] [2022-07-12 18:22:54,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:54,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 18:22:54,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:22:54,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 18:22:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1580, Unknown=8, NotChecked=0, Total=1722 [2022-07-12 18:22:54,498 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:59,165 INFO L93 Difference]: Finished difference Result 277 states and 311 transitions. [2022-07-12 18:22:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:22:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 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 36 [2022-07-12 18:22:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:59,167 INFO L225 Difference]: With dead ends: 277 [2022-07-12 18:22:59,167 INFO L226 Difference]: Without dead ends: 258 [2022-07-12 18:22:59,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=383, Invalid=3641, Unknown=8, NotChecked=0, Total=4032 [2022-07-12 18:22:59,168 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 126 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:59,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 684 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 307 Invalid, 0 Unknown, 159 Unchecked, 0.1s Time] [2022-07-12 18:22:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-12 18:22:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2022-07-12 18:22:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 246 states have (on average 1.1341463414634145) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2022-07-12 18:22:59,171 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 36 [2022-07-12 18:22:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:59,171 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2022-07-12 18:22:59,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2022-07-12 18:22:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 18:22:59,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:59,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:59,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:59,373 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:22:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2022-07-12 18:22:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:22:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825992930] [2022-07-12 18:22:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:22:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:22:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:59,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:22:59,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825992930] [2022-07-12 18:22:59,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825992930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:22:59,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954792324] [2022-07-12 18:22:59,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:22:59,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:22:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:22:59,547 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) [2022-07-12 18:22:59,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:22:59,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 18:22:59,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:59,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:22:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:59,634 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:22:59,634 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:22:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:59,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954792324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:00,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:00,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-07-12 18:23:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801324298] [2022-07-12 18:23:00,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:00,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:23:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:23:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:23:00,057 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:00,686 INFO L93 Difference]: Finished difference Result 389 states and 424 transitions. [2022-07-12 18:23:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:23:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2022-07-12 18:23:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:00,687 INFO L225 Difference]: With dead ends: 389 [2022-07-12 18:23:00,687 INFO L226 Difference]: Without dead ends: 389 [2022-07-12 18:23:00,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:23:00,688 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 337 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:00,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 364 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:23:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-12 18:23:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 258. [2022-07-12 18:23:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 255 states have (on average 1.1372549019607843) internal successors, (290), 257 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 290 transitions. [2022-07-12 18:23:00,692 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 290 transitions. Word has length 37 [2022-07-12 18:23:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 290 transitions. [2022-07-12 18:23:00,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 290 transitions. [2022-07-12 18:23:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 18:23:00,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:00,693 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:00,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:00,901 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 1 times [2022-07-12 18:23:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197036368] [2022-07-12 18:23:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197036368] [2022-07-12 18:23:01,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197036368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776238446] [2022-07-12 18:23:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:01,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:01,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:01,028 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:01,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:23:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:23:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:01,111 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:01,111 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:01,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:01,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776238446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:01,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:01,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-07-12 18:23:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003983038] [2022-07-12 18:23:01,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:23:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:23:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:23:01,631 INFO L87 Difference]: Start difference. First operand 258 states and 290 transitions. Second operand has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:02,981 INFO L93 Difference]: Finished difference Result 342 states and 371 transitions. [2022-07-12 18:23:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:23:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 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 39 [2022-07-12 18:23:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:02,982 INFO L225 Difference]: With dead ends: 342 [2022-07-12 18:23:02,982 INFO L226 Difference]: Without dead ends: 317 [2022-07-12 18:23:02,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 18:23:02,983 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 413 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:02,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 409 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:23:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-12 18:23:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 256. [2022-07-12 18:23:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 255 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2022-07-12 18:23:02,987 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 39 [2022-07-12 18:23:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:02,987 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2022-07-12 18:23:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2022-07-12 18:23:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:23:02,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:02,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:03,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:03,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:03,205 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2022-07-12 18:23:03,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:03,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100551416] [2022-07-12 18:23:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:03,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:03,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:03,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100551416] [2022-07-12 18:23:03,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100551416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:03,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735940800] [2022-07-12 18:23:03,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:23:03,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:03,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:03,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:03,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:23:03,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 18:23:03,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:23:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:03,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:03,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:23:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:03,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:03,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:23:03,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:23:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:03,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735940800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:03,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:03,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-07-12 18:23:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257561389] [2022-07-12 18:23:03,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:03,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:23:03,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:03,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:23:03,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:23:03,709 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:04,132 INFO L93 Difference]: Finished difference Result 488 states and 529 transitions. [2022-07-12 18:23:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:23:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 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 40 [2022-07-12 18:23:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:04,134 INFO L225 Difference]: With dead ends: 488 [2022-07-12 18:23:04,134 INFO L226 Difference]: Without dead ends: 460 [2022-07-12 18:23:04,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:23:04,134 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:04,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 635 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:23:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-12 18:23:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 291. [2022-07-12 18:23:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 1.1284722222222223) internal successors, (325), 290 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2022-07-12 18:23:04,139 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 40 [2022-07-12 18:23:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:04,139 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2022-07-12 18:23:04,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2022-07-12 18:23:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:23:04,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:04,139 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:04,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:04,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:04,340 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2022-07-12 18:23:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222697691] [2022-07-12 18:23:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:04,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222697691] [2022-07-12 18:23:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222697691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346261438] [2022-07-12 18:23:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:23:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:04,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:23:04,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 18:23:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:23:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:04,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:23:04,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:23:04,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:04,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346261438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:04,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-07-12 18:23:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867194693] [2022-07-12 18:23:04,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:23:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:23:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:23:04,926 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:05,489 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2022-07-12 18:23:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:23:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 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 40 [2022-07-12 18:23:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:05,491 INFO L225 Difference]: With dead ends: 387 [2022-07-12 18:23:05,491 INFO L226 Difference]: Without dead ends: 387 [2022-07-12 18:23:05,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 18:23:05,492 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 286 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:05,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 469 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:23:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-12 18:23:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 329. [2022-07-12 18:23:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 326 states have (on average 1.138036809815951) internal successors, (371), 328 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 371 transitions. [2022-07-12 18:23:05,497 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 371 transitions. Word has length 40 [2022-07-12 18:23:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:05,497 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 371 transitions. [2022-07-12 18:23:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 371 transitions. [2022-07-12 18:23:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:23:05,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:05,498 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:05,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:05,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:05,715 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2139029910, now seen corresponding path program 1 times [2022-07-12 18:23:05,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641215054] [2022-07-12 18:23:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:23:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641215054] [2022-07-12 18:23:05,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641215054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355998763] [2022-07-12 18:23:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:05,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:05,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:05,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:23:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:06,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:23:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:06,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:06,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:06,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:06,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:06,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:23:06,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:23:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:23:06,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:06,366 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:23:06,399 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:23:06,404 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int)) (v_ArrVal_767 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_766) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:23:06,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:23:06,418 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_767) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:23:06,427 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:06,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:23:06,432 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:06,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:23:06,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:23:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 11 not checked. [2022-07-12 18:23:06,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355998763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:06,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:06,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 33 [2022-07-12 18:23:06,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556035956] [2022-07-12 18:23:06,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:06,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 18:23:06,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 18:23:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=675, Unknown=5, NotChecked=280, Total=1056 [2022-07-12 18:23:06,577 INFO L87 Difference]: Start difference. First operand 329 states and 371 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:06,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:06,982 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-07-12 18:23:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:23:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2022-07-12 18:23:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:06,983 INFO L225 Difference]: With dead ends: 383 [2022-07-12 18:23:06,983 INFO L226 Difference]: Without dead ends: 343 [2022-07-12 18:23:06,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1058, Unknown=5, NotChecked=350, Total=1560 [2022-07-12 18:23:06,984 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 86 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:06,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 816 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 562 Invalid, 0 Unknown, 527 Unchecked, 0.2s Time] [2022-07-12 18:23:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-12 18:23:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2022-07-12 18:23:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 321 states have (on average 1.1214953271028036) internal successors, (360), 323 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 360 transitions. [2022-07-12 18:23:06,987 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 360 transitions. Word has length 43 [2022-07-12 18:23:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:06,988 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 360 transitions. [2022-07-12 18:23:07,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 360 transitions. [2022-07-12 18:23:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:23:07,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:07,010 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:07,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 18:23:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:07,223 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2022-07-12 18:23:07,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:07,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993812995] [2022-07-12 18:23:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:07,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993812995] [2022-07-12 18:23:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993812995] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536675789] [2022-07-12 18:23:07,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:23:07,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:07,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:07,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:23:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 18:23:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:07,461 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:07,462 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536675789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:08,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:08,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-07-12 18:23:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284461510] [2022-07-12 18:23:08,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 18:23:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 18:23:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:23:08,113 INFO L87 Difference]: Start difference. First operand 324 states and 360 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:09,140 INFO L93 Difference]: Finished difference Result 558 states and 603 transitions. [2022-07-12 18:23:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:23:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-12 18:23:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:09,142 INFO L225 Difference]: With dead ends: 558 [2022-07-12 18:23:09,142 INFO L226 Difference]: Without dead ends: 558 [2022-07-12 18:23:09,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 18:23:09,143 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 572 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:09,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 469 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:23:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-12 18:23:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 336. [2022-07-12 18:23:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 333 states have (on average 1.1261261261261262) internal successors, (375), 335 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 375 transitions. [2022-07-12 18:23:09,154 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 375 transitions. Word has length 44 [2022-07-12 18:23:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:09,154 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 375 transitions. [2022-07-12 18:23:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 375 transitions. [2022-07-12 18:23:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:23:09,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:09,154 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:09,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:09,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 18:23:09,364 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2022-07-12 18:23:09,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:09,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560058431] [2022-07-12 18:23:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:09,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560058431] [2022-07-12 18:23:09,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560058431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292984214] [2022-07-12 18:23:09,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:23:09,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:09,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:09,690 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:09,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:23:09,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 18:23:09,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-12 18:23:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:09,818 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:09,818 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:09,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:09,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:10,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:10,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:10,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:23:10,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:23:10,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-12 18:23:10,614 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-12 18:23:10,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 18 [2022-07-12 18:23:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:10,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:10,657 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0)) is different from false [2022-07-12 18:23:10,662 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0))) is different from false [2022-07-12 18:23:10,673 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:23:10,681 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int)) (v_ArrVal_859 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_858))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0) (= (select (select .cse0 |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)))) is different from false [2022-07-12 18:23:10,702 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_858 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)))) (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-12 18:23:10,711 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int)) (v_ArrVal_857 (Array Int Int)) (v_ArrVal_859 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_857))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0) (= (select (select (store .cse0 |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)))) is different from false [2022-07-12 18:23:10,740 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-12 18:23:10,749 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_858) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_859) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-12 18:23:10,757 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:10,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-07-12 18:23:10,770 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-12 18:23:10,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2022-07-12 18:23:10,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:23:10,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:23:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2022-07-12 18:23:11,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292984214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:11,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:11,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-07-12 18:23:11,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786699180] [2022-07-12 18:23:11,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:11,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 18:23:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 18:23:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1844, Unknown=8, NotChecked=744, Total=2756 [2022-07-12 18:23:11,139 INFO L87 Difference]: Start difference. First operand 336 states and 375 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:12,872 INFO L93 Difference]: Finished difference Result 522 states and 575 transitions. [2022-07-12 18:23:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 18:23:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-12 18:23:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:12,874 INFO L225 Difference]: With dead ends: 522 [2022-07-12 18:23:12,874 INFO L226 Difference]: Without dead ends: 468 [2022-07-12 18:23:12,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=637, Invalid=5087, Unknown=8, NotChecked=1240, Total=6972 [2022-07-12 18:23:12,875 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 356 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 996 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:12,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1136 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 936 Invalid, 0 Unknown, 996 Unchecked, 0.3s Time] [2022-07-12 18:23:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-12 18:23:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 427. [2022-07-12 18:23:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 424 states have (on average 1.1273584905660377) internal successors, (478), 426 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 478 transitions. [2022-07-12 18:23:12,881 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 478 transitions. Word has length 44 [2022-07-12 18:23:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:12,881 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 478 transitions. [2022-07-12 18:23:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 478 transitions. [2022-07-12 18:23:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:23:12,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:12,883 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:12,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-12 18:23:13,095 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2022-07-12 18:23:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547250866] [2022-07-12 18:23:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:13,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547250866] [2022-07-12 18:23:13,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547250866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319655423] [2022-07-12 18:23:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:23:13,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:13,259 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:13,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:23:13,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:23:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 18:23:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:13,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:13,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:23:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:13,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:13,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:23:13,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:23:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:13,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319655423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:13,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:13,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2022-07-12 18:23:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534583547] [2022-07-12 18:23:13,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:13,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:23:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:23:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:23:13,605 INFO L87 Difference]: Start difference. First operand 427 states and 478 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 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) [2022-07-12 18:23:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:14,035 INFO L93 Difference]: Finished difference Result 899 states and 971 transitions. [2022-07-12 18:23:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:23:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 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) Word has length 47 [2022-07-12 18:23:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:14,040 INFO L225 Difference]: With dead ends: 899 [2022-07-12 18:23:14,040 INFO L226 Difference]: Without dead ends: 882 [2022-07-12 18:23:14,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:23:14,043 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 263 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:14,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1055 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 939 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-07-12 18:23:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-07-12 18:23:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 515. [2022-07-12 18:23:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 512 states have (on average 1.126953125) internal successors, (577), 514 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 577 transitions. [2022-07-12 18:23:14,065 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 577 transitions. Word has length 47 [2022-07-12 18:23:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:14,066 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 577 transitions. [2022-07-12 18:23:14,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 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) [2022-07-12 18:23:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 577 transitions. [2022-07-12 18:23:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:23:14,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:14,067 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:14,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:14,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-12 18:23:14,279 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2022-07-12 18:23:14,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:14,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378513840] [2022-07-12 18:23:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:14,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:14,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378513840] [2022-07-12 18:23:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378513840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052253139] [2022-07-12 18:23:14,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:23:14,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:14,457 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:14,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:23:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-12 18:23:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:14,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:23:14,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:23:14,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:14,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:15,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052253139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:15,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:15,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-07-12 18:23:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201282079] [2022-07-12 18:23:15,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 18:23:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 18:23:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:23:15,219 INFO L87 Difference]: Start difference. First operand 515 states and 577 transitions. Second operand has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:16,200 INFO L93 Difference]: Finished difference Result 558 states and 611 transitions. [2022-07-12 18:23:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:23:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-12 18:23:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:16,203 INFO L225 Difference]: With dead ends: 558 [2022-07-12 18:23:16,203 INFO L226 Difference]: Without dead ends: 558 [2022-07-12 18:23:16,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=642, Invalid=3018, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 18:23:16,203 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 420 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:16,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 792 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:23:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-12 18:23:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2022-07-12 18:23:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 517 states have (on average 1.125725338491296) internal successors, (582), 519 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 582 transitions. [2022-07-12 18:23:16,208 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 582 transitions. Word has length 48 [2022-07-12 18:23:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:16,209 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 582 transitions. [2022-07-12 18:23:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 582 transitions. [2022-07-12 18:23:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:23:16,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:16,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:16,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 18:23:16,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:16,419 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash 615332876, now seen corresponding path program 2 times [2022-07-12 18:23:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833556307] [2022-07-12 18:23:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:16,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:16,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833556307] [2022-07-12 18:23:16,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833556307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535295333] [2022-07-12 18:23:16,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:23:16,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:16,571 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:16,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:23:16,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:23:16,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:23:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:16,685 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:16,685 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:16,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:17,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535295333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:17,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:17,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-07-12 18:23:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023786600] [2022-07-12 18:23:17,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:17,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 18:23:17,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 18:23:17,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:23:17,407 INFO L87 Difference]: Start difference. First operand 520 states and 582 transitions. Second operand has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:19,171 INFO L93 Difference]: Finished difference Result 672 states and 729 transitions. [2022-07-12 18:23:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 18:23:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-12 18:23:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:19,176 INFO L225 Difference]: With dead ends: 672 [2022-07-12 18:23:19,176 INFO L226 Difference]: Without dead ends: 623 [2022-07-12 18:23:19,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1442, Invalid=5698, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 18:23:19,178 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 968 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:19,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 554 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:23:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-12 18:23:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 531. [2022-07-12 18:23:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 528 states have (on average 1.1174242424242424) internal successors, (590), 530 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 590 transitions. [2022-07-12 18:23:19,184 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 590 transitions. Word has length 48 [2022-07-12 18:23:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:19,184 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 590 transitions. [2022-07-12 18:23:19,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 590 transitions. [2022-07-12 18:23:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:23:19,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:19,185 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:19,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:19,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 18:23:19,400 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2022-07-12 18:23:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315192214] [2022-07-12 18:23:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315192214] [2022-07-12 18:23:19,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315192214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846916554] [2022-07-12 18:23:19,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:23:19,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:19,603 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:19,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:23:19,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 18:23:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 18:23:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:19,710 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:19,710 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:20,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846916554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:20,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:20,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2022-07-12 18:23:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261002385] [2022-07-12 18:23:20,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:23:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:23:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:23:20,522 INFO L87 Difference]: Start difference. First operand 531 states and 590 transitions. Second operand has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:21,392 INFO L93 Difference]: Finished difference Result 963 states and 1037 transitions. [2022-07-12 18:23:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:23:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 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 51 [2022-07-12 18:23:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:21,395 INFO L225 Difference]: With dead ends: 963 [2022-07-12 18:23:21,395 INFO L226 Difference]: Without dead ends: 963 [2022-07-12 18:23:21,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=996, Invalid=4116, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 18:23:21,396 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 545 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:21,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 538 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:23:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-12 18:23:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 546. [2022-07-12 18:23:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 545 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 609 transitions. [2022-07-12 18:23:21,404 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 609 transitions. Word has length 51 [2022-07-12 18:23:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:21,404 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 609 transitions. [2022-07-12 18:23:21,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 609 transitions. [2022-07-12 18:23:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:23:21,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:21,406 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:21,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:21,623 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2022-07-12 18:23:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:21,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945709020] [2022-07-12 18:23:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:21,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:22,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:22,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945709020] [2022-07-12 18:23:22,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945709020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:22,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948510752] [2022-07-12 18:23:22,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:23:22,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:22,292 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:22,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:23:22,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:23:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-12 18:23:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:22,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:23:22,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:22,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:22,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:23,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:23,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:23,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:23:23,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:23:23,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:23,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-12 18:23:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:23,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:23,434 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:23:23,439 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:23:23,444 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (v_ArrVal_1099 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1099) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:23:23,450 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:23:23,456 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (v_ArrVal_1098 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:23:23,461 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:23:23,469 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1097) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:23:23,518 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| Int)) (or (not (<= |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| |c_ULTIMATE.start_cstrcat_~append#1.offset|)) (not (<= 0 |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| 4)) 0))) is different from false [2022-07-12 18:23:23,539 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107|) (not (<= 0 |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| 4)) 0))) is different from false [2022-07-12 18:23:23,550 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:23,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:23:23,556 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:23,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:23:23,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:23:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 38 not checked. [2022-07-12 18:23:24,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948510752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:24,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:24,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 22] total 64 [2022-07-12 18:23:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664014754] [2022-07-12 18:23:24,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 18:23:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 18:23:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2819, Unknown=9, NotChecked=1026, Total=4032 [2022-07-12 18:23:24,025 INFO L87 Difference]: Start difference. First operand 546 states and 609 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:25,195 INFO L93 Difference]: Finished difference Result 666 states and 736 transitions. [2022-07-12 18:23:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 18:23:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-12 18:23:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:25,196 INFO L225 Difference]: With dead ends: 666 [2022-07-12 18:23:25,196 INFO L226 Difference]: Without dead ends: 619 [2022-07-12 18:23:25,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 9 IntricatePredicates, 4 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=359, Invalid=5823, Unknown=16, NotChecked=1458, Total=7656 [2022-07-12 18:23:25,199 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 234 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1413 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:25,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2004 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1044 Invalid, 0 Unknown, 1413 Unchecked, 0.3s Time] [2022-07-12 18:23:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-07-12 18:23:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 601. [2022-07-12 18:23:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 598 states have (on average 1.120401337792642) internal successors, (670), 600 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 670 transitions. [2022-07-12 18:23:25,205 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 670 transitions. Word has length 52 [2022-07-12 18:23:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:25,205 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 670 transitions. [2022-07-12 18:23:25,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 670 transitions. [2022-07-12 18:23:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:23:25,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:25,207 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:25,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:25,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-12 18:23:25,421 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 3 times [2022-07-12 18:23:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:25,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535733509] [2022-07-12 18:23:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535733509] [2022-07-12 18:23:25,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535733509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496800431] [2022-07-12 18:23:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:23:25,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:25,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:25,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:25,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:23:25,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 18:23:25,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 18:23:25,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:25,827 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:23:25,827 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:23:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:23:26,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:23:26,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496800431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:26,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:26,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-12 18:23:26,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713768348] [2022-07-12 18:23:26,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:26,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 18:23:26,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 18:23:26,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:23:26,753 INFO L87 Difference]: Start difference. First operand 601 states and 670 transitions. Second operand has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:29,122 INFO L93 Difference]: Finished difference Result 913 states and 980 transitions. [2022-07-12 18:23:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-12 18:23:29,123 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-12 18:23:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:29,124 INFO L225 Difference]: With dead ends: 913 [2022-07-12 18:23:29,124 INFO L226 Difference]: Without dead ends: 821 [2022-07-12 18:23:29,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2093, Invalid=8827, Unknown=0, NotChecked=0, Total=10920 [2022-07-12 18:23:29,125 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 729 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:29,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 796 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:23:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-07-12 18:23:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 553. [2022-07-12 18:23:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.1090909090909091) internal successors, (610), 552 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 610 transitions. [2022-07-12 18:23:29,131 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 610 transitions. Word has length 53 [2022-07-12 18:23:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:29,132 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 610 transitions. [2022-07-12 18:23:29,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 610 transitions. [2022-07-12 18:23:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:23:29,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:29,133 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:29,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:29,347 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:23:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash 97693371, now seen corresponding path program 10 times [2022-07-12 18:23:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:29,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577909965] [2022-07-12 18:23:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:29,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:29,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577909965] [2022-07-12 18:23:29,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577909965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:29,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090235414] [2022-07-12 18:23:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:23:29,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:29,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:29,576 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:29,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:23:29,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:23:29,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:23:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:29,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:23:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 45 refuted. 23 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:23:43,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:44,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2022-07-12 18:23:44,361 INFO L356 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-07-12 18:23:44,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 170 treesize of output 144 [2022-07-12 18:23:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 70 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090235414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:44,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:44,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 31] total 70 [2022-07-12 18:23:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458010971] [2022-07-12 18:23:44,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-12 18:23:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-12 18:23:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=4211, Unknown=36, NotChecked=0, Total=4830 [2022-07-12 18:23:44,948 INFO L87 Difference]: Start difference. First operand 553 states and 610 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:17,649 INFO L93 Difference]: Finished difference Result 850 states and 934 transitions. [2022-07-12 18:24:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-12 18:24:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-12 18:24:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:17,651 INFO L225 Difference]: With dead ends: 850 [2022-07-12 18:24:17,651 INFO L226 Difference]: Without dead ends: 787 [2022-07-12 18:24:17,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4986 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=1917, Invalid=14525, Unknown=70, NotChecked=0, Total=16512 [2022-07-12 18:24:17,652 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 277 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:17,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 434 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 791 Invalid, 0 Unknown, 427 Unchecked, 0.3s Time] [2022-07-12 18:24:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-07-12 18:24:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 763. [2022-07-12 18:24:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 760 states have (on average 1.1105263157894736) internal successors, (844), 762 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 844 transitions. [2022-07-12 18:24:17,658 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 844 transitions. Word has length 54 [2022-07-12 18:24:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:17,658 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 844 transitions. [2022-07-12 18:24:17,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 844 transitions. [2022-07-12 18:24:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:24:17,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:17,659 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:17,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 18:24:17,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:17,876 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash 126995243, now seen corresponding path program 9 times [2022-07-12 18:24:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:17,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269572507] [2022-07-12 18:24:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:18,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:18,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269572507] [2022-07-12 18:24:18,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269572507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:18,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424071911] [2022-07-12 18:24:18,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:24:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:18,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:18,077 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:18,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:24:18,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 18:24:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 18:24:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:18,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:18,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-12 18:24:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:18,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424071911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:18,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:18,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-12 18:24:18,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893395345] [2022-07-12 18:24:18,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:18,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 18:24:18,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 18:24:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 18:24:18,811 INFO L87 Difference]: Start difference. First operand 763 states and 844 transitions. Second operand has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:19,448 INFO L93 Difference]: Finished difference Result 985 states and 1079 transitions. [2022-07-12 18:24:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:24:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-12 18:24:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:19,451 INFO L225 Difference]: With dead ends: 985 [2022-07-12 18:24:19,451 INFO L226 Difference]: Without dead ends: 985 [2022-07-12 18:24:19,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=673, Invalid=2867, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 18:24:19,451 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 489 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:19,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 673 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:24:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-07-12 18:24:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 846. [2022-07-12 18:24:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 843 states have (on average 1.1233689205219455) internal successors, (947), 845 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 947 transitions. [2022-07-12 18:24:19,462 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 947 transitions. Word has length 56 [2022-07-12 18:24:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:19,463 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 947 transitions. [2022-07-12 18:24:19,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 947 transitions. [2022-07-12 18:24:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 18:24:19,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:19,464 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:19,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:19,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:19,680 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash -358114732, now seen corresponding path program 2 times [2022-07-12 18:24:19,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:19,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380935861] [2022-07-12 18:24:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:19,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380935861] [2022-07-12 18:24:19,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380935861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009384210] [2022-07-12 18:24:19,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:24:19,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:19,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:19,872 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:19,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:24:19,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:24:19,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 18:24:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:20,000 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:24:20,000 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:24:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:20,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:20,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009384210] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:20,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:20,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-12 18:24:20,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068868729] [2022-07-12 18:24:20,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:20,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 18:24:20,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 18:24:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:24:20,920 INFO L87 Difference]: Start difference. First operand 846 states and 947 transitions. Second operand has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:22,607 INFO L93 Difference]: Finished difference Result 1151 states and 1254 transitions. [2022-07-12 18:24:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 18:24:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 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 [2022-07-12 18:24:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:22,610 INFO L225 Difference]: With dead ends: 1151 [2022-07-12 18:24:22,610 INFO L226 Difference]: Without dead ends: 1151 [2022-07-12 18:24:22,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1598, Invalid=6058, Unknown=0, NotChecked=0, Total=7656 [2022-07-12 18:24:22,611 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 756 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:22,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 717 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:24:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-07-12 18:24:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 859. [2022-07-12 18:24:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 856 states have (on average 1.125) internal successors, (963), 858 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 963 transitions. [2022-07-12 18:24:22,618 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 963 transitions. Word has length 57 [2022-07-12 18:24:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:22,618 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 963 transitions. [2022-07-12 18:24:22,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 963 transitions. [2022-07-12 18:24:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 18:24:22,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:22,619 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:22,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-12 18:24:22,820 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 244902880, now seen corresponding path program 2 times [2022-07-12 18:24:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:22,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050752199] [2022-07-12 18:24:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:24:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050752199] [2022-07-12 18:24:23,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050752199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948800823] [2022-07-12 18:24:23,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:24:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:23,226 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:23,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:24:23,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:24:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-12 18:24:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:23,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:24:23,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:24:23,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:24:23,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:24:23,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:23,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:23,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:24:23,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:24:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:24:23,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:23,883 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:24:23,888 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:24:23,893 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1368 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:24:23,898 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:23,903 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1367 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1367) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:23,907 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:23,912 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1366 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1366) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:23,917 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:23,927 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1369) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:24:23,933 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:23,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:24:23,938 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:23,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:24:23,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:24:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 39 not checked. [2022-07-12 18:24:24,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948800823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:24,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:24,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 49 [2022-07-12 18:24:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478275884] [2022-07-12 18:24:24,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 18:24:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 18:24:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1450, Unknown=9, NotChecked=756, Total=2352 [2022-07-12 18:24:24,152 INFO L87 Difference]: Start difference. First operand 859 states and 963 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 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) [2022-07-12 18:24:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:25,032 INFO L93 Difference]: Finished difference Result 966 states and 1067 transitions. [2022-07-12 18:24:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:24:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 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) Word has length 59 [2022-07-12 18:24:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:25,035 INFO L225 Difference]: With dead ends: 966 [2022-07-12 18:24:25,035 INFO L226 Difference]: Without dead ends: 918 [2022-07-12 18:24:25,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 91 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=2367, Unknown=9, NotChecked=954, Total=3540 [2022-07-12 18:24:25,036 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 129 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1059 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:25,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1481 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1363 Invalid, 0 Unknown, 1059 Unchecked, 0.4s Time] [2022-07-12 18:24:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-07-12 18:24:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 868. [2022-07-12 18:24:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 865 states have (on average 1.1132947976878613) internal successors, (963), 867 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 963 transitions. [2022-07-12 18:24:25,043 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 963 transitions. Word has length 59 [2022-07-12 18:24:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:25,044 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 963 transitions. [2022-07-12 18:24:25,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 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) [2022-07-12 18:24:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 963 transitions. [2022-07-12 18:24:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:24:25,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:25,045 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:25,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:25,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:25,262 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 102819635, now seen corresponding path program 10 times [2022-07-12 18:24:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549457495] [2022-07-12 18:24:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:25,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549457495] [2022-07-12 18:24:25,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549457495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151059309] [2022-07-12 18:24:25,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:24:25,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:25,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:25,767 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:25,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:24:25,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:24:25,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-12 18:24:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:25,924 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:24:25,925 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:24:25,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:24:26,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:24:26,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:26,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:26,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:26,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:26,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:26,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:24:26,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-12 18:24:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 37 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:26,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:42,631 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:42,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-12 18:24:42,637 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:42,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-12 18:24:42,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-12 18:24:43,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:24:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 24 proven. 77 refuted. 16 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151059309] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:43,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:43,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 71 [2022-07-12 18:24:43,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457059830] [2022-07-12 18:24:43,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:43,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-12 18:24:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-12 18:24:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=4558, Unknown=75, NotChecked=0, Total=4970 [2022-07-12 18:24:43,304 INFO L87 Difference]: Start difference. First operand 868 states and 963 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:45,023 INFO L93 Difference]: Finished difference Result 991 states and 1102 transitions. [2022-07-12 18:24:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 18:24:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 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 60 [2022-07-12 18:24:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:45,025 INFO L225 Difference]: With dead ends: 991 [2022-07-12 18:24:45,025 INFO L226 Difference]: Without dead ends: 960 [2022-07-12 18:24:45,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=986, Invalid=10929, Unknown=75, NotChecked=0, Total=11990 [2022-07-12 18:24:45,027 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 276 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:45,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1757 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 874 Invalid, 0 Unknown, 263 Unchecked, 0.3s Time] [2022-07-12 18:24:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-07-12 18:24:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 941. [2022-07-12 18:24:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 938 states have (on average 1.1130063965884862) internal successors, (1044), 940 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1044 transitions. [2022-07-12 18:24:45,033 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1044 transitions. Word has length 60 [2022-07-12 18:24:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:45,034 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1044 transitions. [2022-07-12 18:24:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1044 transitions. [2022-07-12 18:24:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 18:24:45,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:45,035 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:45,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:45,252 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -845094975, now seen corresponding path program 11 times [2022-07-12 18:24:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89423473] [2022-07-12 18:24:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:45,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:45,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:45,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89423473] [2022-07-12 18:24:45,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89423473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:45,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988975008] [2022-07-12 18:24:45,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:24:45,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:45,479 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:45,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:24:45,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-12 18:24:45,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:24:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:45,620 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:24:45,620 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:24:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:45,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:46,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988975008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:46,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:46,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-07-12 18:24:46,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490177177] [2022-07-12 18:24:46,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 18:24:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 18:24:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:24:46,352 INFO L87 Difference]: Start difference. First operand 941 states and 1044 transitions. Second operand has 52 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:47,900 INFO L93 Difference]: Finished difference Result 1920 states and 2063 transitions. [2022-07-12 18:24:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 18:24:47,901 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 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 62 [2022-07-12 18:24:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:47,904 INFO L225 Difference]: With dead ends: 1920 [2022-07-12 18:24:47,905 INFO L226 Difference]: Without dead ends: 1920 [2022-07-12 18:24:47,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1872, Invalid=6318, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 18:24:47,908 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 459 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:47,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 922 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:24:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2022-07-12 18:24:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 977. [2022-07-12 18:24:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 974 states have (on average 1.1190965092402465) internal successors, (1090), 976 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1090 transitions. [2022-07-12 18:24:47,923 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1090 transitions. Word has length 62 [2022-07-12 18:24:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:47,923 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1090 transitions. [2022-07-12 18:24:47,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1090 transitions. [2022-07-12 18:24:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 18:24:47,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:47,925 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:47,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:48,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 18:24:48,138 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1739829774, now seen corresponding path program 4 times [2022-07-12 18:24:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:48,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051930390] [2022-07-12 18:24:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:48,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:48,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:48,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051930390] [2022-07-12 18:24:48,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051930390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:48,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326385371] [2022-07-12 18:24:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:24:48,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:48,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:48,372 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:48,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:24:48,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:24:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-12 18:24:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:24:48,525 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:24:48,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:24:48,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:24:48,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:24:48,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:24:48,871 INFO L356 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2022-07-12 18:24:48,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-07-12 18:24:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 18:24:49,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:50,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-12 18:24:50,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:24:50,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-12 18:24:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:24:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 18:24:50,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326385371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:50,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:50,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2022-07-12 18:24:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391683394] [2022-07-12 18:24:50,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:50,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 18:24:50,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 18:24:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 18:24:50,445 INFO L87 Difference]: Start difference. First operand 977 states and 1090 transitions. Second operand has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 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) [2022-07-12 18:24:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:54,129 INFO L93 Difference]: Finished difference Result 1182 states and 1292 transitions. [2022-07-12 18:24:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-12 18:24:54,129 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 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) Word has length 62 [2022-07-12 18:24:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:54,132 INFO L225 Difference]: With dead ends: 1182 [2022-07-12 18:24:54,132 INFO L226 Difference]: Without dead ends: 1039 [2022-07-12 18:24:54,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1383, Invalid=14367, Unknown=0, NotChecked=0, Total=15750 [2022-07-12 18:24:54,133 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 192 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:54,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1022 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2345 Invalid, 0 Unknown, 201 Unchecked, 0.9s Time] [2022-07-12 18:24:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-07-12 18:24:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 948. [2022-07-12 18:24:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 945 states have (on average 1.1121693121693121) internal successors, (1051), 947 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1051 transitions. [2022-07-12 18:24:54,140 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1051 transitions. Word has length 62 [2022-07-12 18:24:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:54,141 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1051 transitions. [2022-07-12 18:24:54,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 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) [2022-07-12 18:24:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1051 transitions. [2022-07-12 18:24:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:24:54,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:54,170 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:54,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:54,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-12 18:24:54,386 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1394468106, now seen corresponding path program 11 times [2022-07-12 18:24:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669965781] [2022-07-12 18:24:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:54,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:54,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669965781] [2022-07-12 18:24:54,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669965781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:54,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102683262] [2022-07-12 18:24:54,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:24:54,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:54,614 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:54,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:24:54,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 18:24:54,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:54,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 18:24:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:55,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:55,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-12 18:24:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102683262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:55,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-07-12 18:24:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096281731] [2022-07-12 18:24:55,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:55,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 18:24:55,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:55,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 18:24:55,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:24:55,590 INFO L87 Difference]: Start difference. First operand 948 states and 1051 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:56,648 INFO L93 Difference]: Finished difference Result 1259 states and 1380 transitions. [2022-07-12 18:24:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 18:24:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-12 18:24:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:56,651 INFO L225 Difference]: With dead ends: 1259 [2022-07-12 18:24:56,651 INFO L226 Difference]: Without dead ends: 1259 [2022-07-12 18:24:56,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=872, Invalid=3820, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 18:24:56,652 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 514 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:56,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1572 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:24:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-07-12 18:24:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1087. [2022-07-12 18:24:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1084 states have (on average 1.1208487084870848) internal successors, (1215), 1086 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1215 transitions. [2022-07-12 18:24:56,660 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1215 transitions. Word has length 64 [2022-07-12 18:24:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:56,661 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1215 transitions. [2022-07-12 18:24:56,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1215 transitions. [2022-07-12 18:24:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 18:24:56,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:56,662 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:56,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:56,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:56,879 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:24:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash 828941765, now seen corresponding path program 3 times [2022-07-12 18:24:56,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:56,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410215172] [2022-07-12 18:24:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:24:57,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410215172] [2022-07-12 18:24:57,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410215172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462202129] [2022-07-12 18:24:57,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:24:57,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:57,388 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:57,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 18:24:57,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 18:24:57,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-12 18:24:57,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:57,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:24:57,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:24:57,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:24:58,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:24:58,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:58,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:58,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:24:58,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:24:58,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:24:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:24:58,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:58,264 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:24:58,269 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:24:58,274 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int)) (v_ArrVal_1690 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1690) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:24:58,278 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,283 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1689 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1689) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-12 18:24:58,288 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,292 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,297 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,302 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1687 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1687) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,306 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1691) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:24:58,321 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:58,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:24:58,326 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:58,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:24:58,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:24:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 59 not checked. [2022-07-12 18:24:58,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462202129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:58,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:58,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 59 [2022-07-12 18:24:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946391060] [2022-07-12 18:24:58,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 18:24:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 18:24:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2122, Unknown=11, NotChecked=1122, Total=3422 [2022-07-12 18:24:58,593 INFO L87 Difference]: Start difference. First operand 1087 states and 1215 transitions. Second operand has 59 states, 59 states have (on average 2.542372881355932) internal successors, (150), 59 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:59,926 INFO L93 Difference]: Finished difference Result 1253 states and 1370 transitions. [2022-07-12 18:24:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 18:24:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.542372881355932) internal successors, (150), 59 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-12 18:24:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:59,929 INFO L225 Difference]: With dead ends: 1253 [2022-07-12 18:24:59,929 INFO L226 Difference]: Without dead ends: 1148 [2022-07-12 18:24:59,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 100 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 11 IntricatePredicates, 2 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=3791, Unknown=11, NotChecked=1474, Total=5550 [2022-07-12 18:24:59,930 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 222 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2238 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:59,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 2083 Invalid, 4123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1862 Invalid, 0 Unknown, 2238 Unchecked, 0.7s Time] [2022-07-12 18:24:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-07-12 18:24:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1032. [2022-07-12 18:24:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1029 states have (on average 1.1098153547133138) internal successors, (1142), 1031 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1142 transitions. [2022-07-12 18:24:59,953 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1142 transitions. Word has length 67 [2022-07-12 18:24:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:59,954 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1142 transitions. [2022-07-12 18:24:59,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.542372881355932) internal successors, (150), 59 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1142 transitions. [2022-07-12 18:24:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 18:24:59,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:59,956 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:59,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:00,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:00,173 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2066697040, now seen corresponding path program 5 times [2022-07-12 18:25:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:00,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342560668] [2022-07-12 18:25:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:00,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:00,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342560668] [2022-07-12 18:25:00,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342560668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831006431] [2022-07-12 18:25:00,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:25:00,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:00,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:00,459 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:00,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 18:25:00,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 18:25:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 18:25:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:00,643 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:25:00,643 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:25:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:25:01,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 66 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:25:01,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831006431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:01,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:01,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 55 [2022-07-12 18:25:01,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549545251] [2022-07-12 18:25:01,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:01,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 18:25:01,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 18:25:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2746, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 18:25:01,876 INFO L87 Difference]: Start difference. First operand 1032 states and 1142 transitions. Second operand has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:05,902 INFO L93 Difference]: Finished difference Result 1750 states and 1868 transitions. [2022-07-12 18:25:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-12 18:25:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 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 67 [2022-07-12 18:25:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:05,906 INFO L225 Difference]: With dead ends: 1750 [2022-07-12 18:25:05,906 INFO L226 Difference]: Without dead ends: 1636 [2022-07-12 18:25:05,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3303, Invalid=14787, Unknown=0, NotChecked=0, Total=18090 [2022-07-12 18:25:05,907 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1045 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 3600 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 3600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:05,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 1531 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 3600 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 18:25:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-07-12 18:25:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 973. [2022-07-12 18:25:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 970 states have (on average 1.1020618556701032) internal successors, (1069), 972 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1069 transitions. [2022-07-12 18:25:05,927 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1069 transitions. Word has length 67 [2022-07-12 18:25:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:05,927 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1069 transitions. [2022-07-12 18:25:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1069 transitions. [2022-07-12 18:25:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 18:25:05,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:05,928 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:05,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-12 18:25:06,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:06,145 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1532583327, now seen corresponding path program 12 times [2022-07-12 18:25:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:06,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386080447] [2022-07-12 18:25:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:06,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:25:06,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:06,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386080447] [2022-07-12 18:25:06,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386080447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:06,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301678994] [2022-07-12 18:25:06,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:25:06,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:06,415 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:06,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 18:25:06,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 18:25:06,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 18:25:06,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:06,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:25:06,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:25:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:25:06,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:06,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:25:06,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:25:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:25:07,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301678994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:07,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:07,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 39 [2022-07-12 18:25:07,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726395499] [2022-07-12 18:25:07,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:07,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 18:25:07,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 18:25:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:25:07,082 INFO L87 Difference]: Start difference. First operand 973 states and 1069 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:08,033 INFO L93 Difference]: Finished difference Result 2220 states and 2365 transitions. [2022-07-12 18:25:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 18:25:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 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 68 [2022-07-12 18:25:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:08,037 INFO L225 Difference]: With dead ends: 2220 [2022-07-12 18:25:08,038 INFO L226 Difference]: Without dead ends: 2168 [2022-07-12 18:25:08,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=2955, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 18:25:08,038 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 428 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:08,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 2349 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:25:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2022-07-12 18:25:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1131. [2022-07-12 18:25:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1128 states have (on average 1.1037234042553192) internal successors, (1245), 1130 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1245 transitions. [2022-07-12 18:25:08,049 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1245 transitions. Word has length 68 [2022-07-12 18:25:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:08,050 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1245 transitions. [2022-07-12 18:25:08,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1245 transitions. [2022-07-12 18:25:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 18:25:08,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:08,051 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:08,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:08,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-12 18:25:08,267 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -404858498, now seen corresponding path program 12 times [2022-07-12 18:25:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921183897] [2022-07-12 18:25:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:08,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:08,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921183897] [2022-07-12 18:25:08,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921183897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928694287] [2022-07-12 18:25:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:25:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:08,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:08,882 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:08,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 18:25:09,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-12 18:25:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 161 conjunts are in the unsatisfiable core [2022-07-12 18:25:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:09,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:25:09,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:25:09,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:09,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:25:09,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:25:10,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:25:10,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:25:10,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:25:10,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:25:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:25:10,435 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:25:10,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-12 18:25:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:10,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:10,442 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:25:10,446 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:25:10,449 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int)) (v_ArrVal_1870 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1870) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:25:10,453 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,456 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int)) (v_ArrVal_1869 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1869) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-12 18:25:10,459 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,463 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1868 (Array Int Int)) (v_ArrVal_1871 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1868) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,466 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,469 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1867 (Array Int Int)) (v_ArrVal_1871 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1867) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,473 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,476 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1866 (Array Int Int)) (v_ArrVal_1871 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1866) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,480 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,484 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1871) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:25:10,488 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:25:10,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:25:10,499 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:25:10,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:25:10,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:25:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 83 not checked. [2022-07-12 18:25:10,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928694287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:10,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:10,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 27, 27] total 79 [2022-07-12 18:25:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765538914] [2022-07-12 18:25:10,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:10,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-12 18:25:10,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-12 18:25:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4087, Unknown=13, NotChecked=1820, Total=6162 [2022-07-12 18:25:10,786 INFO L87 Difference]: Start difference. First operand 1131 states and 1245 transitions. Second operand has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:11,794 INFO L93 Difference]: Finished difference Result 1318 states and 1448 transitions. [2022-07-12 18:25:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 18:25:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 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 68 [2022-07-12 18:25:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:11,805 INFO L225 Difference]: With dead ends: 1318 [2022-07-12 18:25:11,805 INFO L226 Difference]: Without dead ends: 1227 [2022-07-12 18:25:11,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 13 IntricatePredicates, 4 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=382, Invalid=6967, Unknown=13, NotChecked=2340, Total=9702 [2022-07-12 18:25:11,806 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 163 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1752 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:11,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1886 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1002 Invalid, 0 Unknown, 1752 Unchecked, 0.2s Time] [2022-07-12 18:25:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-07-12 18:25:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1213. [2022-07-12 18:25:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1210 states have (on average 1.1041322314049586) internal successors, (1336), 1212 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1336 transitions. [2022-07-12 18:25:11,813 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1336 transitions. Word has length 68 [2022-07-12 18:25:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:11,814 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1336 transitions. [2022-07-12 18:25:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1336 transitions. [2022-07-12 18:25:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 18:25:11,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:11,815 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:11,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:12,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-12 18:25:12,033 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1922758244, now seen corresponding path program 13 times [2022-07-12 18:25:12,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:12,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253245407] [2022-07-12 18:25:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:12,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253245407] [2022-07-12 18:25:12,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253245407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602060148] [2022-07-12 18:25:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:25:12,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:12,332 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:12,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 18:25:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 18:25:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:12,509 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:25:12,509 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:25:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:13,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 120 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:13,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602060148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:13,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 63 [2022-07-12 18:25:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898488542] [2022-07-12 18:25:13,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:13,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 18:25:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 18:25:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 18:25:13,992 INFO L87 Difference]: Start difference. First operand 1213 states and 1336 transitions. Second operand has 64 states, 63 states have (on average 3.253968253968254) internal successors, (205), 64 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:16,483 INFO L93 Difference]: Finished difference Result 2333 states and 2498 transitions. [2022-07-12 18:25:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 18:25:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.253968253968254) internal successors, (205), 64 states have internal predecessors, (205), 0 states have call successors, (0), 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 72 [2022-07-12 18:25:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:16,488 INFO L225 Difference]: With dead ends: 2333 [2022-07-12 18:25:16,488 INFO L226 Difference]: Without dead ends: 2333 [2022-07-12 18:25:16,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1860, Invalid=8240, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 18:25:16,489 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 805 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:16,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 1224 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2784 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 18:25:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-07-12 18:25:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1234. [2022-07-12 18:25:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1231 states have (on average 1.107229894394801) internal successors, (1363), 1233 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1363 transitions. [2022-07-12 18:25:16,501 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1363 transitions. Word has length 72 [2022-07-12 18:25:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:16,501 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1363 transitions. [2022-07-12 18:25:16,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.253968253968254) internal successors, (205), 64 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1363 transitions. [2022-07-12 18:25:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 18:25:16,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:16,503 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:16,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:16,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-12 18:25:16,719 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash -807593407, now seen corresponding path program 13 times [2022-07-12 18:25:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838011819] [2022-07-12 18:25:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:16,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:16,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838011819] [2022-07-12 18:25:16,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838011819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:16,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875188426] [2022-07-12 18:25:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:25:16,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:16,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:16,964 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:16,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 18:25:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 18:25:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:25:17,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:25:17,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:25:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:17,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875188426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:18,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:18,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2022-07-12 18:25:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944047270] [2022-07-12 18:25:18,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:18,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 18:25:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 18:25:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:25:18,129 INFO L87 Difference]: Start difference. First operand 1234 states and 1363 transitions. Second operand has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:19,525 INFO L93 Difference]: Finished difference Result 1646 states and 1799 transitions. [2022-07-12 18:25:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 18:25:19,526 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 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 72 [2022-07-12 18:25:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:19,541 INFO L225 Difference]: With dead ends: 1646 [2022-07-12 18:25:19,541 INFO L226 Difference]: Without dead ends: 1646 [2022-07-12 18:25:19,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1566, Invalid=7176, Unknown=0, NotChecked=0, Total=8742 [2022-07-12 18:25:19,543 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 759 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:19,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 1270 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:25:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-12 18:25:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1350. [2022-07-12 18:25:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1347 states have (on average 1.1202672605790647) internal successors, (1509), 1349 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1509 transitions. [2022-07-12 18:25:19,556 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1509 transitions. Word has length 72 [2022-07-12 18:25:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:19,556 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 1509 transitions. [2022-07-12 18:25:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1509 transitions. [2022-07-12 18:25:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 18:25:19,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:19,557 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:19,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:19,774 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 532989117, now seen corresponding path program 6 times [2022-07-12 18:25:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:19,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955858033] [2022-07-12 18:25:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:19,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:20,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:20,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955858033] [2022-07-12 18:25:20,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955858033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:20,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230023735] [2022-07-12 18:25:20,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:25:20,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:20,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:20,030 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:20,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 18:25:20,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 18:25:20,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-12 18:25:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:20,388 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:25:20,389 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:25:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:20,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 66 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:21,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230023735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:21,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:21,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2022-07-12 18:25:21,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657470297] [2022-07-12 18:25:21,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:21,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 18:25:21,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:21,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 18:25:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:25:21,521 INFO L87 Difference]: Start difference. First operand 1350 states and 1509 transitions. Second operand has 57 states, 56 states have (on average 3.5) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:25,196 INFO L93 Difference]: Finished difference Result 1828 states and 1985 transitions. [2022-07-12 18:25:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-12 18:25:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.5) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 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 72 [2022-07-12 18:25:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:25,199 INFO L225 Difference]: With dead ends: 1828 [2022-07-12 18:25:25,199 INFO L226 Difference]: Without dead ends: 1828 [2022-07-12 18:25:25,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4497, Invalid=16383, Unknown=0, NotChecked=0, Total=20880 [2022-07-12 18:25:25,200 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1468 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:25,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1468 Valid, 983 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 18:25:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-07-12 18:25:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1352. [2022-07-12 18:25:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1349 states have (on average 1.1215715344699777) internal successors, (1513), 1351 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1513 transitions. [2022-07-12 18:25:25,211 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1513 transitions. Word has length 72 [2022-07-12 18:25:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:25,211 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 1513 transitions. [2022-07-12 18:25:25,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.5) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1513 transitions. [2022-07-12 18:25:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:25:25,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:25,212 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:25,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:25,430 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1087961819, now seen corresponding path program 14 times [2022-07-12 18:25:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:25,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177630652] [2022-07-12 18:25:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 43 proven. 220 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:25:25,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177630652] [2022-07-12 18:25:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177630652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712430544] [2022-07-12 18:25:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:25:25,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:25,784 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:25,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 18:25:25,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:25:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:25:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:25,963 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:25:25,964 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:25:26,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:25:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:25:27,090 INFO L356 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2022-07-12 18:25:27,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-07-12 18:25:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 91 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:27,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:28,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-12 18:25:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:25:28,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-12 18:25:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 120 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:28,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712430544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:28,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:28,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2022-07-12 18:25:28,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181411999] [2022-07-12 18:25:28,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:28,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-12 18:25:28,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-12 18:25:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=6000, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 18:25:28,992 INFO L87 Difference]: Start difference. First operand 1352 states and 1513 transitions. Second operand has 81 states, 81 states have (on average 2.7160493827160495) internal successors, (220), 81 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:31,199 INFO L93 Difference]: Finished difference Result 2970 states and 3208 transitions. [2022-07-12 18:25:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 18:25:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.7160493827160495) internal successors, (220), 81 states have internal predecessors, (220), 0 states have call successors, (0), 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 75 [2022-07-12 18:25:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:31,203 INFO L225 Difference]: With dead ends: 2970 [2022-07-12 18:25:31,203 INFO L226 Difference]: Without dead ends: 2941 [2022-07-12 18:25:31,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1262, Invalid=12310, Unknown=0, NotChecked=0, Total=13572 [2022-07-12 18:25:31,204 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1437 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3000 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 3767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:31,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 2025 Invalid, 3767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3000 Invalid, 0 Unknown, 688 Unchecked, 0.9s Time] [2022-07-12 18:25:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2022-07-12 18:25:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 1635. [2022-07-12 18:25:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1632 states have (on average 1.1286764705882353) internal successors, (1842), 1634 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 1842 transitions. [2022-07-12 18:25:31,221 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 1842 transitions. Word has length 75 [2022-07-12 18:25:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:31,221 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 1842 transitions. [2022-07-12 18:25:31,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.7160493827160495) internal successors, (220), 81 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 1842 transitions. [2022-07-12 18:25:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:25:31,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:31,223 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:31,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:31,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-12 18:25:31,435 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:25:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -215271382, now seen corresponding path program 4 times [2022-07-12 18:25:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:31,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424602912] [2022-07-12 18:25:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:25:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424602912] [2022-07-12 18:25:32,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424602912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730313469] [2022-07-12 18:25:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:25:32,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:32,086 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:25:32,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 18:25:32,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:25:32,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:32,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-12 18:25:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:32,273 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:25:32,273 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:25:32,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:25:32,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:25:32,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:32,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:34,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:37,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:43,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:46,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:48,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-12 18:25:48,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:25:48,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-12 18:25:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 53 proven. 105 refuted. 6 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:25:48,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:23,705 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:26:23,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-12 18:26:23,711 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:26:23,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-12 18:26:23,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-12 18:26:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:26:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 39 proven. 89 refuted. 36 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:26:24,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730313469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:24,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:24,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 79 [2022-07-12 18:26:24,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23890455] [2022-07-12 18:26:24,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:24,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-12 18:26:24,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:24,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-12 18:26:24,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=5645, Unknown=104, NotChecked=0, Total=6162 [2022-07-12 18:26:24,588 INFO L87 Difference]: Start difference. First operand 1635 states and 1842 transitions. Second operand has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:42,125 INFO L93 Difference]: Finished difference Result 1867 states and 2084 transitions. [2022-07-12 18:26:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 18:26:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 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 75 [2022-07-12 18:26:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:42,127 INFO L225 Difference]: With dead ends: 1867 [2022-07-12 18:26:42,127 INFO L226 Difference]: Without dead ends: 1781 [2022-07-12 18:26:42,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=1173, Invalid=13727, Unknown=106, NotChecked=0, Total=15006 [2022-07-12 18:26:42,137 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 258 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 773 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:42,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2288 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1276 Invalid, 0 Unknown, 773 Unchecked, 0.4s Time] [2022-07-12 18:26:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-07-12 18:26:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1609. [2022-07-12 18:26:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1606 states have (on average 1.1164383561643836) internal successors, (1793), 1608 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 1793 transitions. [2022-07-12 18:26:42,149 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 1793 transitions. Word has length 75 [2022-07-12 18:26:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:42,149 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 1793 transitions. [2022-07-12 18:26:42,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 1793 transitions. [2022-07-12 18:26:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:26:42,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:42,163 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:42,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 18:26:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-12 18:26:42,380 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:26:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 191019849, now seen corresponding path program 14 times [2022-07-12 18:26:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:42,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880822956] [2022-07-12 18:26:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 19 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:43,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880822956] [2022-07-12 18:26:43,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880822956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67269811] [2022-07-12 18:26:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:26:43,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:43,567 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:26:43,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 18:26:43,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:26:43,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 150 conjunts are in the unsatisfiable core [2022-07-12 18:26:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:44,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:26:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:26:44,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-12 18:26:44,625 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-12 18:26:44,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-12 18:26:44,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:26:44,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:26:44,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-12 18:26:44,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-12 18:26:44,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-12 18:26:45,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-12 18:26:45,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-12 18:26:45,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-12 18:26:45,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-12 18:26:45,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:26:45,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:26:45,706 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:26:45,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-12 18:26:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:45,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:45,717 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:26:45,721 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:26:45,726 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2301 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2301) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-12 18:26:45,730 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,735 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2300 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2300) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,739 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,743 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2299 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2299) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,746 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-12 18:26:45,751 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2298 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2298) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,755 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-12 18:26:45,758 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,763 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-12 18:26:45,766 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0) (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-12 18:26:45,770 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2296 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2296) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0)) is different from false [2022-07-12 18:26:45,785 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2296 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2296) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-12 18:26:45,789 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-12 18:26:45,796 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2302) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-12 18:26:45,873 INFO L356 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2022-07-12 18:26:45,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2022-07-12 18:26:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:26:45,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:26:45,879 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:26:45,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-07-12 18:26:45,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:26:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 111 not checked. [2022-07-12 18:26:46,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67269811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:46,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:46,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 34] total 99 [2022-07-12 18:26:46,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435678334] [2022-07-12 18:26:46,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:46,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-12 18:26:46,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-12 18:26:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=6374, Unknown=37, NotChecked=2992, Total=9702 [2022-07-12 18:26:46,741 INFO L87 Difference]: Start difference. First operand 1609 states and 1793 transitions. Second operand has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 99 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:48,963 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (let ((.cse0 (not .cse3)) (.cse1 (<= 8 |c_ULTIMATE.start_main_~length1~0#1|)) (.cse2 (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0))) (and (or (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2302) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (or (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) .cse0) (or (and .cse1 (<= |c_ULTIMATE.start_main_~length1~0#1| 8) .cse2) .cse3) (or (and (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) .cse2) .cse3) (or (and .cse0 (= 8 |c_ULTIMATE.start_main_~length1~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| 1) (and (= (+ |c_ULTIMATE.start_main_~length3~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) .cse3)) (or (and .cse1 .cse2 (<= |c_ULTIMATE.start_main_~i~0#1| 7)) .cse3)))) is different from false [2022-07-12 18:26:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:50,782 INFO L93 Difference]: Finished difference Result 1814 states and 2017 transitions. [2022-07-12 18:26:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 18:26:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 99 states have internal predecessors, (208), 0 states have call successors, (0), 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 76 [2022-07-12 18:26:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:50,784 INFO L225 Difference]: With dead ends: 1814 [2022-07-12 18:26:50,784 INFO L226 Difference]: Without dead ends: 1708 [2022-07-12 18:26:50,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 94 SyntacticMatches, 38 SemanticMatches, 135 ConstructedPredicates, 18 IntricatePredicates, 1 DeprecatedPredicates, 6099 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=570, Invalid=13505, Unknown=39, NotChecked=4518, Total=18632 [2022-07-12 18:26:50,785 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 245 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 2728 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 5243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2481 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:50,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 2196 Invalid, 5243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2728 Invalid, 0 Unknown, 2481 Unchecked, 1.1s Time] [2022-07-12 18:26:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-07-12 18:26:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1700. [2022-07-12 18:26:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1697 states have (on average 1.116087212728344) internal successors, (1894), 1699 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 1894 transitions. [2022-07-12 18:26:50,795 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 1894 transitions. Word has length 76 [2022-07-12 18:26:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:50,795 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 1894 transitions. [2022-07-12 18:26:50,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 99 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 1894 transitions. [2022-07-12 18:26:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:26:50,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:50,796 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:50,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-12 18:26:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:51,011 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:26:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1232398120, now seen corresponding path program 7 times [2022-07-12 18:26:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:51,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9048631] [2022-07-12 18:26:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:51,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9048631] [2022-07-12 18:26:51,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9048631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121009870] [2022-07-12 18:26:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:26:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:51,289 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:26:51,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 18:26:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 18:26:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:51,455 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:26:51,456 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:26:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 34 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:52,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:52,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121009870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:52,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:52,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2022-07-12 18:26:52,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48665762] [2022-07-12 18:26:52,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:52,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 18:26:52,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 18:26:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3507, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:26:52,977 INFO L87 Difference]: Start difference. First operand 1700 states and 1894 transitions. Second operand has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:58,786 INFO L93 Difference]: Finished difference Result 2429 states and 2623 transitions. [2022-07-12 18:26:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-12 18:26:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 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 76 [2022-07-12 18:26:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:58,789 INFO L225 Difference]: With dead ends: 2429 [2022-07-12 18:26:58,789 INFO L226 Difference]: Without dead ends: 2269 [2022-07-12 18:26:58,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4968 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4609, Invalid=16853, Unknown=0, NotChecked=0, Total=21462 [2022-07-12 18:26:58,790 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1174 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:58,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1174 Valid, 1301 Invalid, 3434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 18:26:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-07-12 18:26:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1701. [2022-07-12 18:26:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1698 states have (on average 1.107773851590106) internal successors, (1881), 1700 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 1881 transitions. [2022-07-12 18:26:58,802 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 1881 transitions. Word has length 76 [2022-07-12 18:26:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:58,802 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 1881 transitions. [2022-07-12 18:26:58,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 1881 transitions. [2022-07-12 18:26:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:26:58,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:58,804 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:58,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-12 18:26:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:59,021 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:26:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1489111308, now seen corresponding path program 15 times [2022-07-12 18:26:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:59,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791697022] [2022-07-12 18:26:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791697022] [2022-07-12 18:26:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791697022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331568210] [2022-07-12 18:26:59,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:26:59,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:59,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:59,368 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:26:59,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 18:26:59,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 18:26:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-12 18:26:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:00,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:01,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-12 18:27:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:01,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331568210] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:01,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:01,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2022-07-12 18:27:01,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991442606] [2022-07-12 18:27:01,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:01,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 18:27:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:01,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 18:27:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=3715, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 18:27:01,624 INFO L87 Difference]: Start difference. First operand 1701 states and 1881 transitions. Second operand has 65 states, 64 states have (on average 3.59375) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:07,598 INFO L93 Difference]: Finished difference Result 2392 states and 2608 transitions. [2022-07-12 18:27:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-12 18:27:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.59375) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-12 18:27:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:07,601 INFO L225 Difference]: With dead ends: 2392 [2022-07-12 18:27:07,618 INFO L226 Difference]: Without dead ends: 2392 [2022-07-12 18:27:07,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7619 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5788, Invalid=26074, Unknown=0, NotChecked=0, Total=31862 [2022-07-12 18:27:07,619 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1575 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 3479 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 3479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:07,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 1945 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 3479 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-12 18:27:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2022-07-12 18:27:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 1847. [2022-07-12 18:27:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1844 states have (on average 1.1209327548806942) internal successors, (2067), 1846 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2067 transitions. [2022-07-12 18:27:07,632 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2067 transitions. Word has length 80 [2022-07-12 18:27:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:07,633 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2067 transitions. [2022-07-12 18:27:07,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.59375) internal successors, (230), 65 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2067 transitions. [2022-07-12 18:27:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 18:27:07,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:07,634 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:07,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:07,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:07,844 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:27:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1082189677, now seen corresponding path program 3 times [2022-07-12 18:27:07,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:07,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851141676] [2022-07-12 18:27:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:07,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 66 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:08,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851141676] [2022-07-12 18:27:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851141676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86924466] [2022-07-12 18:27:08,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:08,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:08,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:08,135 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:08,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 18:27:08,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 18:27:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 18:27:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:08,676 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:27:08,676 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:27:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 91 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:09,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86924466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:10,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:10,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-07-12 18:27:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969746196] [2022-07-12 18:27:10,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:10,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 18:27:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 18:27:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=3527, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 18:27:10,309 INFO L87 Difference]: Start difference. First operand 1847 states and 2067 transitions. Second operand has 64 states, 63 states have (on average 3.7142857142857144) internal successors, (234), 64 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)