./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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_cstrspn-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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:59:17,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:59:17,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:59:17,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:59:17,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:59:17,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:59:17,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:59:17,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:59:17,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:59:17,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:59:17,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:59:17,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:59:17,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:59:17,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:59:17,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:59:17,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:59:17,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:59:17,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:59:17,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:59:17,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:59:17,340 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:59:17,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:59:17,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:59:17,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:59:17,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:59:17,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:59:17,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:59:17,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:59:17,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:59:17,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:59:17,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:59:17,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:59:17,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:59:17,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:59:17,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:59:17,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:59:17,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:59:17,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:59:17,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:59:17,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:59:17,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:59:17,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:59:17,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:59:17,379 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:59:17,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:59:17,380 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:59:17,380 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:59:17,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:59:17,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:59:17,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:59:17,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:59:17,382 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:59:17,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:59:17,383 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:59:17,383 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:59:17,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:59:17,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:59:17,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:59:17,392 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:59:17,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:59:17,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:59:17,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:59:17,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:59:17,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:59:17,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:59:17,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:59:17,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:59:17,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:59:17,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:59:17,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:59:17,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:59:17,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:59:17,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:59:17,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2022-07-21 16:59:17,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:59:17,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:59:17,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:59:17,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:59:17,732 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:59:17,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-07-21 16:59:17,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eafbc6d70/1f3c00af0ce3436a99d20889c616b025/FLAGeaf8a5138 [2022-07-21 16:59:18,331 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:59:18,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-07-21 16:59:18,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eafbc6d70/1f3c00af0ce3436a99d20889c616b025/FLAGeaf8a5138 [2022-07-21 16:59:18,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eafbc6d70/1f3c00af0ce3436a99d20889c616b025 [2022-07-21 16:59:18,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:59:18,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:59:18,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:59:18,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:59:18,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:59:18,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:18" (1/1) ... [2022-07-21 16:59:18,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c96a532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:18, skipping insertion in model container [2022-07-21 16:59:18,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:18" (1/1) ... [2022-07-21 16:59:18,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:59:18,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:59:19,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:59:19,105 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:59:19,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:59:19,181 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:59:19,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19 WrapperNode [2022-07-21 16:59:19,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:59:19,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:59:19,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:59:19,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:59:19,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,247 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-07-21 16:59:19,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:59:19,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:59:19,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:59:19,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:59:19,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:59:19,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:59:19,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:59:19,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:59:19,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (1/1) ... [2022-07-21 16:59:19,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:59:19,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:19,328 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) [2022-07-21 16:59:19,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:59:19,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:59:19,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:59:19,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:59:19,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:59:19,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:59:19,351 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 [2022-07-21 16:59:19,514 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:59:19,515 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:59:19,781 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:59:19,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:59:19,787 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 16:59:19,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:19 BoogieIcfgContainer [2022-07-21 16:59:19,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:59:19,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:59:19,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:59:19,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:59:19,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:18" (1/3) ... [2022-07-21 16:59:19,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e156b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:19, skipping insertion in model container [2022-07-21 16:59:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:19" (2/3) ... [2022-07-21 16:59:19,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e156b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:19, skipping insertion in model container [2022-07-21 16:59:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:19" (3/3) ... [2022-07-21 16:59:19,797 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2022-07-21 16:59:19,810 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:59:19,811 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-07-21 16:59:19,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:59:19,871 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@501c8ade, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7232d753 [2022-07-21 16:59:19,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-21 16:59:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:59:19,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:19,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:19,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-21 16:59:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:19,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371754184] [2022-07-21 16:59:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:20,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371754184] [2022-07-21 16:59:20,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371754184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:20,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:20,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:20,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537983442] [2022-07-21 16:59:20,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:20,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:20,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:20,161 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-07-21 16:59:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,207 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-07-21 16:59:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-07-21 16:59:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,216 INFO L225 Difference]: With dead ends: 78 [2022-07-21 16:59:20,217 INFO L226 Difference]: Without dead ends: 74 [2022-07-21 16:59:20,218 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 [2022-07-21 16:59:20,221 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 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 [2022-07-21 16:59:20,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-21 16:59:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2022-07-21 16:59:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-21 16:59:20,259 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2022-07-21 16:59:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:20,260 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-21 16:59:20,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-07-21 16:59:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-21 16:59:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:59:20,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:20,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:20,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:59:20,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-21 16:59:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:20,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550000753] [2022-07-21 16:59:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:20,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:20,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550000753] [2022-07-21 16:59:20,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550000753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:20,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:20,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:59:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993477993] [2022-07-21 16:59:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:20,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:59:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:59:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:59:20,311 INFO L87 Difference]: Start difference. First operand 44 states and 50 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) [2022-07-21 16:59:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,336 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-07-21 16:59:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:59:20,336 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 [2022-07-21 16:59:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,337 INFO L225 Difference]: With dead ends: 42 [2022-07-21 16:59:20,337 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 16:59:20,338 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 [2022-07-21 16:59:20,339 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 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 [2022-07-21 16:59:20,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 16:59:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-21 16:59:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-21 16:59:20,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-07-21 16:59:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:20,345 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-21 16:59:20,345 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) [2022-07-21 16:59:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-21 16:59:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:59:20,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:20,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:59:20,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:20,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-21 16:59:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4817781] [2022-07-21 16:59:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:20,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:20,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:20,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4817781] [2022-07-21 16:59:20,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4817781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:20,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:20,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128995628] [2022-07-21 16:59:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:20,415 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-07-21 16:59:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,517 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-07-21 16:59:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2022-07-21 16:59:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,519 INFO L225 Difference]: With dead ends: 75 [2022-07-21 16:59:20,520 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 16:59:20,520 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 [2022-07-21 16:59:20,522 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:20,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 16:59:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2022-07-21 16:59:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-21 16:59:20,535 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2022-07-21 16:59:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:20,536 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-21 16:59:20,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-07-21 16:59:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-21 16:59:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:59:20,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:20,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:20,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:59:20,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:20,538 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-21 16:59:20,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:20,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139310634] [2022-07-21 16:59:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:20,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139310634] [2022-07-21 16:59:20,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139310634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:20,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:20,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797428254] [2022-07-21 16:59:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:20,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:59:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:59:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:20,619 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,747 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-07-21 16:59:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:59:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:59:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,751 INFO L225 Difference]: With dead ends: 72 [2022-07-21 16:59:20,751 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 16:59:20,752 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 [2022-07-21 16:59:20,753 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:20,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 121 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 16:59:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2022-07-21 16:59:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) 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) [2022-07-21 16:59:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-21 16:59:20,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 9 [2022-07-21 16:59:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:20,768 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-21 16:59:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-21 16:59:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:59:20,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:20,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:20,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:59:20,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-21 16:59:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:20,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570835459] [2022-07-21 16:59:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:20,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:20,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570835459] [2022-07-21 16:59:20,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570835459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:20,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:20,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:20,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550984633] [2022-07-21 16:59:20,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:20,845 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,872 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2022-07-21 16:59:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:59:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,874 INFO L225 Difference]: With dead ends: 87 [2022-07-21 16:59:20,874 INFO L226 Difference]: Without dead ends: 87 [2022-07-21 16:59:20,875 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 [2022-07-21 16:59:20,879 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:20,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 108 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-21 16:59:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2022-07-21 16:59:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-21 16:59:20,892 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-07-21 16:59:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:20,893 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-21 16:59:20,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-21 16:59:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:59:20,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:20,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:20,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:59:20,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-21 16:59:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644062109] [2022-07-21 16:59:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:20,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:20,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644062109] [2022-07-21 16:59:20,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644062109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:20,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:20,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:59:20,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049140250] [2022-07-21 16:59:20,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:20,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:59:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:59:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:59:20,956 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,985 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-07-21 16:59:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:59:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:59:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,987 INFO L225 Difference]: With dead ends: 61 [2022-07-21 16:59:20,987 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 16:59:20,987 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 [2022-07-21 16:59:20,992 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:20,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 16:59:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-21 16:59:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.4038461538461537) 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) [2022-07-21 16:59:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-21 16:59:21,002 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-07-21 16:59:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:21,002 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-21 16:59:21,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-21 16:59:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:59:21,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:21,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:21,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:59:21,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-21 16:59:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685784420] [2022-07-21 16:59:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:21,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685784420] [2022-07-21 16:59:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685784420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:21,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:21,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048921276] [2022-07-21 16:59:21,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:59:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:59:21,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:21,102 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:21,160 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2022-07-21 16:59:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:59:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:59:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:21,162 INFO L225 Difference]: With dead ends: 91 [2022-07-21 16:59:21,162 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:59:21,162 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 [2022-07-21 16:59:21,164 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:21,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:59:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2022-07-21 16:59:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-07-21 16:59:21,176 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 9 [2022-07-21 16:59:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:21,177 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-07-21 16:59:21,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-07-21 16:59:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:59:21,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:21,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:21,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 16:59:21,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-07-21 16:59:21,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:21,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142361567] [2022-07-21 16:59:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:21,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142361567] [2022-07-21 16:59:21,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142361567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:21,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:21,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:21,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295139658] [2022-07-21 16:59:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:21,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:21,220 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:21,241 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-07-21 16:59:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:59:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:21,243 INFO L225 Difference]: With dead ends: 64 [2022-07-21 16:59:21,243 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 16:59:21,243 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 [2022-07-21 16:59:21,244 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:21,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 16:59:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-07-21 16:59:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-21 16:59:21,247 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2022-07-21 16:59:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:21,247 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-21 16:59:21,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-21 16:59:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:59:21,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:21,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:21,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:59:21,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-21 16:59:21,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:21,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923533689] [2022-07-21 16:59:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:21,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:21,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923533689] [2022-07-21 16:59:21,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923533689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:21,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:21,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750517346] [2022-07-21 16:59:21,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:21,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:21,287 INFO L87 Difference]: Start difference. First operand 54 states and 65 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) [2022-07-21 16:59:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:21,308 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-07-21 16:59:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:21,308 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 [2022-07-21 16:59:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:21,309 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:59:21,309 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 16:59:21,309 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 [2022-07-21 16:59:21,310 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 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 [2022-07-21 16:59:21,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 16:59:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 16:59:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 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) [2022-07-21 16:59:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-07-21 16:59:21,313 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2022-07-21 16:59:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:21,313 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-07-21 16:59:21,313 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) [2022-07-21 16:59:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-07-21 16:59:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:59:21,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:21,314 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:21,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 16:59:21,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:21,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-21 16:59:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389613106] [2022-07-21 16:59:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389613106] [2022-07-21 16:59:21,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389613106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529193037] [2022-07-21 16:59:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:21,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:21,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:21,379 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) [2022-07-21 16:59:21,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:59:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:21,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:59:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:59:21,515 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 [2022-07-21 16:59:21,531 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 [2022-07-21 16:59:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529193037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:21,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:21,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-21 16:59:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193395848] [2022-07-21 16:59:21,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:21,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:59:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:59:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:59:21,758 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:21,917 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2022-07-21 16:59:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:59:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-07-21 16:59:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:21,918 INFO L225 Difference]: With dead ends: 116 [2022-07-21 16:59:21,923 INFO L226 Difference]: Without dead ends: 116 [2022-07-21 16:59:21,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:59:21,924 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 144 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:21,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 191 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-21 16:59:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2022-07-21 16:59:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 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) [2022-07-21 16:59:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-21 16:59:21,935 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2022-07-21 16:59:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:21,935 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-21 16:59:21,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-21 16:59:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:21,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:21,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:21,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 16:59:22,157 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,SelfDestructingSolverStorable9 [2022-07-21 16:59:22,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2022-07-21 16:59:22,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:22,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540068403] [2022-07-21 16:59:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:22,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:22,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540068403] [2022-07-21 16:59:22,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540068403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:22,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:22,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:22,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919705361] [2022-07-21 16:59:22,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:22,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:59:22,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:22,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:59:22,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:22,208 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:22,255 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-07-21 16:59:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:59:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:22,257 INFO L225 Difference]: With dead ends: 47 [2022-07-21 16:59:22,257 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 16:59:22,257 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 [2022-07-21 16:59:22,258 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:22,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 16:59:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-21 16:59:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) 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) [2022-07-21 16:59:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-21 16:59:22,260 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2022-07-21 16:59:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:22,261 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-21 16:59:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-21 16:59:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:22,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:22,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:22,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:59:22,262 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:22,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2022-07-21 16:59:22,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:22,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716586281] [2022-07-21 16:59:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:22,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:22,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:22,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716586281] [2022-07-21 16:59:22,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716586281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:22,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:22,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:59:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787113572] [2022-07-21 16:59:22,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:22,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:59:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:59:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:59:22,326 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2022-07-21 16:59:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:22,402 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-21 16:59:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:59:22,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 [2022-07-21 16:59:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:22,403 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:59:22,404 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:59:22,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:59:22,404 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:22,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 78 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:59:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-21 16:59:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-21 16:59:22,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2022-07-21 16:59:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:22,407 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-21 16:59:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2022-07-21 16:59:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-21 16:59:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:22,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:22,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 16:59:22,409 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-21 16:59:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:22,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619402590] [2022-07-21 16:59:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:22,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619402590] [2022-07-21 16:59:22,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619402590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036847279] [2022-07-21 16:59:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:22,476 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) [2022-07-21 16:59:22,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:59:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:59:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:22,550 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:22,551 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 [2022-07-21 16:59:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:22,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:22,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036847279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:22,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:22,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-21 16:59:22,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075286108] [2022-07-21 16:59:22,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:22,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:59:22,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:22,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:59:22,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:59:22,765 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:22,909 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-07-21 16:59:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:59:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:22,911 INFO L225 Difference]: With dead ends: 91 [2022-07-21 16:59:22,911 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:59:22,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:59:22,912 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:22,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 173 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:59:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2022-07-21 16:59:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 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) [2022-07-21 16:59:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-21 16:59:22,915 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2022-07-21 16:59:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:22,915 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-21 16:59:22,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-21 16:59:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:59:22,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:22,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:22,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:23,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 16:59:23,132 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2022-07-21 16:59:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295137160] [2022-07-21 16:59:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:23,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295137160] [2022-07-21 16:59:23,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295137160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:23,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:23,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:59:23,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891506139] [2022-07-21 16:59:23,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:23,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:59:23,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:23,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:59:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:59:23,199 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2022-07-21 16:59:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:23,245 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-07-21 16:59:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:59:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 [2022-07-21 16:59:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:23,248 INFO L225 Difference]: With dead ends: 46 [2022-07-21 16:59:23,248 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 16:59:23,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:59:23,249 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:23,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 16:59:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-07-21 16:59:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-21 16:59:23,252 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2022-07-21 16:59:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:23,252 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-21 16:59:23,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2022-07-21 16:59:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-21 16:59:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:59:23,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:23,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:23,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 16:59:23,253 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2022-07-21 16:59:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:23,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500932606] [2022-07-21 16:59:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:23,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500932606] [2022-07-21 16:59:23,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500932606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:23,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:23,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 16:59:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409527613] [2022-07-21 16:59:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:59:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:59:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:59:23,356 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-07-21 16:59:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:23,434 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-21 16:59:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:59:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 [2022-07-21 16:59:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:23,435 INFO L225 Difference]: With dead ends: 49 [2022-07-21 16:59:23,435 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:59:23,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:59:23,436 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:23,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:59:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-07-21 16:59:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 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) [2022-07-21 16:59:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-21 16:59:23,438 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2022-07-21 16:59:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:23,438 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-21 16:59:23,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-07-21 16:59:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-21 16:59:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:59:23,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:23,439 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] [2022-07-21 16:59:23,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:59:23,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2022-07-21 16:59:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:23,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297800984] [2022-07-21 16:59:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:23,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:23,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297800984] [2022-07-21 16:59:23,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297800984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:23,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:23,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844833300] [2022-07-21 16:59:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:23,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:23,550 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2022-07-21 16:59:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:23,564 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-07-21 16:59:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:23,564 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 [2022-07-21 16:59:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:23,565 INFO L225 Difference]: With dead ends: 46 [2022-07-21 16:59:23,565 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 16:59:23,565 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 [2022-07-21 16:59:23,566 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 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 [2022-07-21 16:59:23,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 16:59:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-21 16:59:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-21 16:59:23,568 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2022-07-21 16:59:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:23,568 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-21 16:59:23,568 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) [2022-07-21 16:59:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-21 16:59:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:59:23,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:23,569 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] [2022-07-21 16:59:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 16:59:23,569 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2022-07-21 16:59:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:23,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434181831] [2022-07-21 16:59:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:23,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434181831] [2022-07-21 16:59:23,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434181831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:23,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:23,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 16:59:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615946258] [2022-07-21 16:59:23,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:59:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:59:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:59:23,662 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-07-21 16:59:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:23,840 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-21 16:59:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:59:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 [2022-07-21 16:59:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:23,841 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:59:23,841 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 16:59:23,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:59:23,842 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:23,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 16:59:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-21 16:59:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-21 16:59:23,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2022-07-21 16:59:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:23,843 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-21 16:59:23,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-07-21 16:59:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-21 16:59:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:59:23,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:23,844 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] [2022-07-21 16:59:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:59:23,844 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2022-07-21 16:59:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722693655] [2022-07-21 16:59:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:24,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722693655] [2022-07-21 16:59:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722693655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:24,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:24,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 16:59:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096099812] [2022-07-21 16:59:24,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:24,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 16:59:24,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:24,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 16:59:24,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:59:24,012 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-07-21 16:59:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:24,160 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-21 16:59:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:59:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 [2022-07-21 16:59:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:24,161 INFO L225 Difference]: With dead ends: 48 [2022-07-21 16:59:24,161 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 16:59:24,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:59:24,162 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:24,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 150 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 16:59:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-07-21 16:59:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-21 16:59:24,164 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2022-07-21 16:59:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:24,165 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-21 16:59:24,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-07-21 16:59:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-21 16:59:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:59:24,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:24,166 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, 1] [2022-07-21 16:59:24,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 16:59:24,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:24,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2022-07-21 16:59:24,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:24,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105890749] [2022-07-21 16:59:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:24,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:24,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105890749] [2022-07-21 16:59:24,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105890749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130328487] [2022-07-21 16:59:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:24,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:24,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:24,329 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) [2022-07-21 16:59:24,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:59:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 16:59:24,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:24,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:24,748 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 5 treesize of output 3 [2022-07-21 16:59:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130328487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:24,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:24,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-21 16:59:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780109638] [2022-07-21 16:59:24,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 16:59:24,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 16:59:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:59:24,771 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) [2022-07-21 16:59:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:25,126 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-07-21 16:59:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:59:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) Word has length 25 [2022-07-21 16:59:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:25,127 INFO L225 Difference]: With dead ends: 49 [2022-07-21 16:59:25,128 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:59:25,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:59:25,128 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:25,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 212 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:59:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-07-21 16:59:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-07-21 16:59:25,130 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-07-21 16:59:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:25,130 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-07-21 16:59:25,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) [2022-07-21 16:59:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-07-21 16:59:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:59:25,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:25,131 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, 1] [2022-07-21 16:59:25,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:25,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:25,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:25,332 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2022-07-21 16:59:25,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:25,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22079419] [2022-07-21 16:59:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:25,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:25,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:25,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22079419] [2022-07-21 16:59:25,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22079419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:25,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988508523] [2022-07-21 16:59:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:25,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:25,656 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) [2022-07-21 16:59:25,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:59:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 16:59:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:25,811 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 [2022-07-21 16:59:25,869 INFO L356 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2022-07-21 16:59:25,869 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 16:59:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:26,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:26,003 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 [2022-07-21 16:59:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:26,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:26,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988508523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:26,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:59:26,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2022-07-21 16:59:26,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471395443] [2022-07-21 16:59:26,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:26,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:59:26,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:59:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:59:26,073 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) 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) [2022-07-21 16:59:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:26,109 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-07-21 16:59:26,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:59:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) 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 25 [2022-07-21 16:59:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:26,110 INFO L225 Difference]: With dead ends: 65 [2022-07-21 16:59:26,110 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 16:59:26,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:59:26,111 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:26,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 166 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-07-21 16:59:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 16:59:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-21 16:59:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 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) [2022-07-21 16:59:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-07-21 16:59:26,113 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2022-07-21 16:59:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:26,113 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-07-21 16:59:26,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) 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) [2022-07-21 16:59:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-07-21 16:59:26,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:59:26,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:26,114 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, 1] [2022-07-21 16:59:26,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:26,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:26,314 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2022-07-21 16:59:26,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:26,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692442371] [2022-07-21 16:59:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:26,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692442371] [2022-07-21 16:59:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692442371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:26,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 16:59:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727126231] [2022-07-21 16:59:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:26,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:59:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:59:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:59:26,448 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2022-07-21 16:59:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:26,592 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-07-21 16:59:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:59:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 25 [2022-07-21 16:59:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:26,593 INFO L225 Difference]: With dead ends: 93 [2022-07-21 16:59:26,593 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 16:59:26,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:59:26,594 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:26,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 16:59:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2022-07-21 16:59:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 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) [2022-07-21 16:59:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-07-21 16:59:26,596 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2022-07-21 16:59:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:26,596 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-07-21 16:59:26,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2022-07-21 16:59:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-07-21 16:59:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 16:59:26,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:26,597 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, 1, 1, 1, 1, 1] [2022-07-21 16:59:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 16:59:26,597 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2022-07-21 16:59:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619329630] [2022-07-21 16:59:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:26,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619329630] [2022-07-21 16:59:26,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619329630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:26,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859635674] [2022-07-21 16:59:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:26,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:26,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:26,720 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) [2022-07-21 16:59:26,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:59:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 16:59:26,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:26,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:27,045 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 5 treesize of output 3 [2022-07-21 16:59:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:27,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859635674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:27,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:27,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-21 16:59:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595722362] [2022-07-21 16:59:27,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 16:59:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 16:59:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:59:27,070 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 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) [2022-07-21 16:59:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:27,329 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-07-21 16:59:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:59:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 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) Word has length 29 [2022-07-21 16:59:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:27,330 INFO L225 Difference]: With dead ends: 86 [2022-07-21 16:59:27,330 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 16:59:27,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:59:27,331 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 192 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:27,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 281 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 16:59:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-21 16:59:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-07-21 16:59:27,333 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2022-07-21 16:59:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:27,334 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-07-21 16:59:27,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 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) [2022-07-21 16:59:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-07-21 16:59:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:59:27,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:27,335 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:27,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 16:59:27,549 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2022-07-21 16:59:27,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:27,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653877691] [2022-07-21 16:59:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:27,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653877691] [2022-07-21 16:59:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653877691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965618078] [2022-07-21 16:59:27,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:59:27,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:27,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:27,706 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) [2022-07-21 16:59:27,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:59:27,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:59:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:27,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 16:59:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:27,813 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 [2022-07-21 16:59:28,129 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:28,130 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 20 treesize of output 20 [2022-07-21 16:59:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:28,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:28,772 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 [2022-07-21 16:59:28,777 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 26 treesize of output 22 [2022-07-21 16:59:28,782 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 35 treesize of output 27 [2022-07-21 16:59:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:28,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965618078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:28,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:28,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2022-07-21 16:59:28,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990690380] [2022-07-21 16:59:28,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 16:59:28,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 16:59:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 16:59:28,812 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-07-21 16:59:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:29,319 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2022-07-21 16:59:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 16:59:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) Word has length 30 [2022-07-21 16:59:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:29,322 INFO L225 Difference]: With dead ends: 134 [2022-07-21 16:59:29,322 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 16:59:29,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=2494, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 16:59:29,324 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:29,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 373 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-07-21 16:59:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 16:59:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2022-07-21 16:59:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2022-07-21 16:59:29,328 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2022-07-21 16:59:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:29,329 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2022-07-21 16:59:29,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-07-21 16:59:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2022-07-21 16:59:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 16:59:29,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:29,330 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, 1, 1, 1, 1, 1] [2022-07-21 16:59:29,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:29,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:29,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2022-07-21 16:59:29,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:29,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525300172] [2022-07-21 16:59:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:29,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:29,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:29,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525300172] [2022-07-21 16:59:29,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525300172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:29,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029816583] [2022-07-21 16:59:29,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:59:29,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:29,821 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) [2022-07-21 16:59:29,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:59:29,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:59:29,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 16:59:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:29,905 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 [2022-07-21 16:59:30,020 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 [2022-07-21 16:59:30,053 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 [2022-07-21 16:59:30,236 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:59:30,237 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 [2022-07-21 16:59:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:30,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:30,380 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_286 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:59:30,396 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:30,396 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 [2022-07-21 16:59:30,413 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:30,413 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 [2022-07-21 16:59:30,417 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 [2022-07-21 16:59:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:30,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029816583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:30,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:30,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 32 [2022-07-21 16:59:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350312896] [2022-07-21 16:59:30,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:30,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 16:59:30,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 16:59:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=826, Unknown=1, NotChecked=58, Total=992 [2022-07-21 16:59:30,581 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:31,172 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-07-21 16:59:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:59:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-21 16:59:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:31,173 INFO L225 Difference]: With dead ends: 178 [2022-07-21 16:59:31,173 INFO L226 Difference]: Without dead ends: 178 [2022-07-21 16:59:31,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=1653, Unknown=1, NotChecked=86, Total=2070 [2022-07-21 16:59:31,174 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 209 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:31,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 455 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 255 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-07-21 16:59:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-21 16:59:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2022-07-21 16:59:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.139240506329114) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2022-07-21 16:59:31,178 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 37 [2022-07-21 16:59:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:31,179 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2022-07-21 16:59:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2022-07-21 16:59:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 16:59:31,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:31,179 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:31,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:31,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:31,380 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2022-07-21 16:59:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:31,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181209833] [2022-07-21 16:59:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:31,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181209833] [2022-07-21 16:59:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181209833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217286130] [2022-07-21 16:59:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:59:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:31,564 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) [2022-07-21 16:59:31,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:59:31,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:59:31,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-21 16:59:31,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:31,662 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 [2022-07-21 16:59:31,869 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 [2022-07-21 16:59:31,900 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 [2022-07-21 16:59:32,357 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:59:32,358 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 1 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 16:59:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:32,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:41,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:41,834 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 26 treesize of output 27 [2022-07-21 16:59:41,838 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:41,839 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 27 treesize of output 31 [2022-07-21 16:59:41,845 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 [2022-07-21 16:59:41,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:41,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-07-21 16:59:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:43,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217286130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:43,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:43,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16] total 42 [2022-07-21 16:59:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591156077] [2022-07-21 16:59:43,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 16:59:43,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 16:59:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1555, Unknown=27, NotChecked=0, Total=1722 [2022-07-21 16:59:43,112 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:46,012 INFO L93 Difference]: Finished difference Result 325 states and 354 transitions. [2022-07-21 16:59:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 16:59:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2022-07-21 16:59:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:46,013 INFO L225 Difference]: With dead ends: 325 [2022-07-21 16:59:46,013 INFO L226 Difference]: Without dead ends: 279 [2022-07-21 16:59:46,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=355, Invalid=3518, Unknown=33, NotChecked=0, Total=3906 [2022-07-21 16:59:46,015 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:46,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 751 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 495 Invalid, 0 Unknown, 285 Unchecked, 0.2s Time] [2022-07-21 16:59:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-21 16:59:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 194. [2022-07-21 16:59:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 193 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 218 transitions. [2022-07-21 16:59:46,020 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 218 transitions. Word has length 39 [2022-07-21 16:59:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:46,020 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 218 transitions. [2022-07-21 16:59:46,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 218 transitions. [2022-07-21 16:59:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 16:59:46,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:46,021 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:46,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 16:59:46,239 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,SelfDestructingSolverStorable24 [2022-07-21 16:59:46,240 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2022-07-21 16:59:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458373963] [2022-07-21 16:59:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458373963] [2022-07-21 16:59:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458373963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264543816] [2022-07-21 16:59:46,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:59:46,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:46,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:46,376 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) [2022-07-21 16:59:46,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:59:46,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:59:46,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:59:46,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:46,470 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:46,471 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 [2022-07-21 16:59:46,740 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 13 treesize of output 9 [2022-07-21 16:59:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:47,303 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:47,304 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 19 treesize of output 15 [2022-07-21 16:59:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:47,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:47,891 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 37 treesize of output 31 [2022-07-21 16:59:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:48,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264543816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:48,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:48,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 44 [2022-07-21 16:59:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765293369] [2022-07-21 16:59:48,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:59:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:59:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:59:48,666 INFO L87 Difference]: Start difference. First operand 194 states and 218 transitions. Second operand has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 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) [2022-07-21 16:59:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:50,621 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2022-07-21 16:59:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:59:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 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 41 [2022-07-21 16:59:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:50,622 INFO L225 Difference]: With dead ends: 252 [2022-07-21 16:59:50,623 INFO L226 Difference]: Without dead ends: 252 [2022-07-21 16:59:50,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=743, Invalid=5419, Unknown=0, NotChecked=0, Total=6162 [2022-07-21 16:59:50,625 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:50,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 871 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 835 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2022-07-21 16:59:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-21 16:59:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2022-07-21 16:59:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2022-07-21 16:59:50,631 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 41 [2022-07-21 16:59:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:50,631 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2022-07-21 16:59:50,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 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) [2022-07-21 16:59:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2022-07-21 16:59:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:59:50,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:50,640 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, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:50,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:50,847 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,SelfDestructingSolverStorable25 [2022-07-21 16:59:50,847 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2022-07-21 16:59:50,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:50,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411686180] [2022-07-21 16:59:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:59:51,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:51,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411686180] [2022-07-21 16:59:51,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411686180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:51,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030506478] [2022-07-21 16:59:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:51,003 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) [2022-07-21 16:59:51,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:59:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:51,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 16:59:51,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:51,171 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 [2022-07-21 16:59:51,330 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 [2022-07-21 16:59:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:59:51,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:51,409 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 [2022-07-21 16:59:51,411 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 [2022-07-21 16:59:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:59:51,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030506478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:51,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:51,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-07-21 16:59:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628724628] [2022-07-21 16:59:51,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:51,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:59:51,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:51,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:59:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:59:51,505 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:51,885 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2022-07-21 16:59:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:59:51,885 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 16:59:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:51,886 INFO L225 Difference]: With dead ends: 258 [2022-07-21 16:59:51,886 INFO L226 Difference]: Without dead ends: 227 [2022-07-21 16:59:51,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:59:51,887 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:51,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 299 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-07-21 16:59:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-21 16:59:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-07-21 16:59:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 225 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 253 transitions. [2022-07-21 16:59:51,892 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 253 transitions. Word has length 42 [2022-07-21 16:59:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:51,893 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 253 transitions. [2022-07-21 16:59:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 253 transitions. [2022-07-21 16:59:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 16:59:51,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:51,894 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:51,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:52,109 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,SelfDestructingSolverStorable26 [2022-07-21 16:59:52,109 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2022-07-21 16:59:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:52,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160575645] [2022-07-21 16:59:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:52,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160575645] [2022-07-21 16:59:52,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160575645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036924482] [2022-07-21 16:59:52,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:59:52,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:52,281 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) [2022-07-21 16:59:52,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:59:52,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:59:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 16:59:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:52,360 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:52,360 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 [2022-07-21 16:59:52,491 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 16 treesize of output 12 [2022-07-21 16:59:52,712 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:52,712 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 21 treesize of output 21 [2022-07-21 16:59:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:52,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:53,293 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 [2022-07-21 16:59:53,295 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 [2022-07-21 16:59:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:53,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036924482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:53,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:53,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-07-21 16:59:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185607411] [2022-07-21 16:59:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:59:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:59:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:59:53,765 INFO L87 Difference]: Start difference. First operand 226 states and 253 transitions. Second operand has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 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) [2022-07-21 16:59:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:55,957 INFO L93 Difference]: Finished difference Result 471 states and 519 transitions. [2022-07-21 16:59:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:59:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 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 43 [2022-07-21 16:59:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:55,959 INFO L225 Difference]: With dead ends: 471 [2022-07-21 16:59:55,959 INFO L226 Difference]: Without dead ends: 471 [2022-07-21 16:59:55,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1301, Invalid=5341, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 16:59:55,961 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 842 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:55,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 611 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 834 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-07-21 16:59:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-07-21 16:59:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 283. [2022-07-21 16:59:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 1.1387900355871887) internal successors, (320), 282 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 320 transitions. [2022-07-21 16:59:55,970 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 320 transitions. Word has length 43 [2022-07-21 16:59:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:55,970 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 320 transitions. [2022-07-21 16:59:55,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 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) [2022-07-21 16:59:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 320 transitions. [2022-07-21 16:59:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 16:59:55,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:55,972 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:55,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 16:59:56,195 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,SelfDestructingSolverStorable27 [2022-07-21 16:59:56,195 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2022-07-21 16:59:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:56,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068562861] [2022-07-21 16:59:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:56,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068562861] [2022-07-21 16:59:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068562861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655705728] [2022-07-21 16:59:56,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:59:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:56,854 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) [2022-07-21 16:59:56,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:59:56,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:59:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:59:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:56,953 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:56,953 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 [2022-07-21 16:59:56,968 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 [2022-07-21 16:59:57,192 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 [2022-07-21 16:59:57,245 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 [2022-07-21 16:59:57,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:57,610 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 [2022-07-21 16:59:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:57,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:58,119 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:58,119 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 [2022-07-21 16:59:58,124 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:58,124 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 [2022-07-21 16:59:58,127 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 [2022-07-21 16:59:58,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:58,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655705728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:58,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:58,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2022-07-21 16:59:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519367868] [2022-07-21 16:59:58,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 16:59:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 16:59:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2564, Unknown=28, NotChecked=0, Total=2756 [2022-07-21 16:59:58,582 INFO L87 Difference]: Start difference. First operand 283 states and 320 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:00,216 INFO L93 Difference]: Finished difference Result 472 states and 532 transitions. [2022-07-21 17:00:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 17:00:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 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 49 [2022-07-21 17:00:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:00,218 INFO L225 Difference]: With dead ends: 472 [2022-07-21 17:00:00,218 INFO L226 Difference]: Without dead ends: 445 [2022-07-21 17:00:00,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=621, Invalid=7361, Unknown=28, NotChecked=0, Total=8010 [2022-07-21 17:00:00,220 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:00,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 956 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 661 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2022-07-21 17:00:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-07-21 17:00:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 412. [2022-07-21 17:00:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 410 states have (on average 1.148780487804878) internal successors, (471), 411 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 471 transitions. [2022-07-21 17:00:00,229 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 471 transitions. Word has length 49 [2022-07-21 17:00:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:00,229 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 471 transitions. [2022-07-21 17:00:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 471 transitions. [2022-07-21 17:00:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:00:00,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:00,230 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:00,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:00,451 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,SelfDestructingSolverStorable28 [2022-07-21 17:00:00,451 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:00,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1185464536, now seen corresponding path program 5 times [2022-07-21 17:00:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:00,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300365095] [2022-07-21 17:00:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:00,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:00,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:00,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300365095] [2022-07-21 17:00:00,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300365095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:00,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031263742] [2022-07-21 17:00:00,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:00,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:00,659 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) [2022-07-21 17:00:00,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:00:00,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 17:00:00,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 17:00:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:00,770 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:00,770 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 [2022-07-21 17:00:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:01,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:01,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031263742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:01,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:01,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-07-21 17:00:01,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974014604] [2022-07-21 17:00:01,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:01,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 17:00:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:01,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 17:00:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:00:01,272 INFO L87 Difference]: Start difference. First operand 412 states and 471 transitions. Second operand has 40 states, 40 states have (on average 3.025) 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) [2022-07-21 17:00:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:02,039 INFO L93 Difference]: Finished difference Result 889 states and 986 transitions. [2022-07-21 17:00:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 17:00:02,040 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) 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 53 [2022-07-21 17:00:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:02,042 INFO L225 Difference]: With dead ends: 889 [2022-07-21 17:00:02,042 INFO L226 Difference]: Without dead ends: 757 [2022-07-21 17:00:02,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=936, Invalid=3096, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 17:00:02,044 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 261 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:02,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 562 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:00:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-07-21 17:00:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 540. [2022-07-21 17:00:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.1449814126394051) internal successors, (616), 539 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 616 transitions. [2022-07-21 17:00:02,056 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 616 transitions. Word has length 53 [2022-07-21 17:00:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:02,056 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 616 transitions. [2022-07-21 17:00:02,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) 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) [2022-07-21 17:00:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 616 transitions. [2022-07-21 17:00:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:00:02,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:02,058 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1] [2022-07-21 17:00:02,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:02,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:02,281 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2022-07-21 17:00:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264836580] [2022-07-21 17:00:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:02,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264836580] [2022-07-21 17:00:02,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264836580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924727698] [2022-07-21 17:00:02,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:02,423 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) [2022-07-21 17:00:02,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:00:02,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 17:00:02,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 17:00:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:02,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:02,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-21 17:00:02,532 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 [2022-07-21 17:00:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:02,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:03,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924727698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:03,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:03,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-07-21 17:00:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606425989] [2022-07-21 17:00:03,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:03,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 17:00:03,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 17:00:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:00:03,041 INFO L87 Difference]: Start difference. First operand 540 states and 616 transitions. Second operand has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:03,777 INFO L93 Difference]: Finished difference Result 641 states and 720 transitions. [2022-07-21 17:00:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:00:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-21 17:00:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:03,779 INFO L225 Difference]: With dead ends: 641 [2022-07-21 17:00:03,779 INFO L226 Difference]: Without dead ends: 641 [2022-07-21 17:00:03,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 17:00:03,781 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 348 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:03,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 843 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:00:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-07-21 17:00:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 601. [2022-07-21 17:00:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 599 states have (on average 1.1452420701168615) internal successors, (686), 600 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 686 transitions. [2022-07-21 17:00:03,797 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 686 transitions. Word has length 53 [2022-07-21 17:00:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:03,798 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 686 transitions. [2022-07-21 17:00:03,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 686 transitions. [2022-07-21 17:00:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 17:00:03,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:03,799 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:03,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 17:00:04,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:04,015 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2022-07-21 17:00:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:04,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338649183] [2022-07-21 17:00:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:04,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:04,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338649183] [2022-07-21 17:00:04,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338649183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:04,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509174983] [2022-07-21 17:00:04,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:00:04,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:04,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:04,274 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) [2022-07-21 17:00:04,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:00:04,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 17:00:04,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 17:00:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:04,481 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 [2022-07-21 17:00:04,616 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 [2022-07-21 17:00:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:04,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:04,709 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 [2022-07-21 17:00:04,712 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 [2022-07-21 17:00:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:04,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509174983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:04,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:04,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2022-07-21 17:00:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759641120] [2022-07-21 17:00:04,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 17:00:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 17:00:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:00:04,845 INFO L87 Difference]: Start difference. First operand 601 states and 686 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:05,606 INFO L93 Difference]: Finished difference Result 1102 states and 1231 transitions. [2022-07-21 17:00:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 17:00:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2022-07-21 17:00:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:05,609 INFO L225 Difference]: With dead ends: 1102 [2022-07-21 17:00:05,610 INFO L226 Difference]: Without dead ends: 1001 [2022-07-21 17:00:05,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 17:00:05,611 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 371 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:05,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1190 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 967 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-07-21 17:00:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-07-21 17:00:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 617. [2022-07-21 17:00:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 615 states have (on average 1.1447154471544716) internal successors, (704), 616 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 704 transitions. [2022-07-21 17:00:05,628 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 704 transitions. Word has length 57 [2022-07-21 17:00:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:05,629 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 704 transitions. [2022-07-21 17:00:05,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 704 transitions. [2022-07-21 17:00:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:00:05,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:05,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:05,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 17:00:05,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:05,839 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1017817884, now seen corresponding path program 1 times [2022-07-21 17:00:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:05,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676783501] [2022-07-21 17:00:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:05,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:06,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:06,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676783501] [2022-07-21 17:00:06,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676783501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:06,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467694364] [2022-07-21 17:00:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:06,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:06,068 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) [2022-07-21 17:00:06,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:00:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 17:00:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:06,185 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 [2022-07-21 17:00:06,354 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 [2022-07-21 17:00:06,389 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 [2022-07-21 17:00:06,507 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 [2022-07-21 17:00:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:06,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:06,599 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_595 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_595) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:00:06,604 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:06,604 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 [2022-07-21 17:00:06,614 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:06,614 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 [2022-07-21 17:00:06,616 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 [2022-07-21 17:00:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467694364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:06,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-21 17:00:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961367329] [2022-07-21 17:00:06,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:00:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:00:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2022-07-21 17:00:06,769 INFO L87 Difference]: Start difference. First operand 617 states and 704 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:07,115 INFO L93 Difference]: Finished difference Result 625 states and 700 transitions. [2022-07-21 17:00:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:00:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 17:00:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:07,117 INFO L225 Difference]: With dead ends: 625 [2022-07-21 17:00:07,117 INFO L226 Difference]: Without dead ends: 544 [2022-07-21 17:00:07,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1258, Unknown=1, NotChecked=72, Total=1482 [2022-07-21 17:00:07,118 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:07,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 801 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-07-21 17:00:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-07-21 17:00:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 475. [2022-07-21 17:00:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.1374207188160677) internal successors, (538), 474 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 538 transitions. [2022-07-21 17:00:07,127 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 538 transitions. Word has length 58 [2022-07-21 17:00:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:07,127 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 538 transitions. [2022-07-21 17:00:07,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 538 transitions. [2022-07-21 17:00:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 17:00:07,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:07,129 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:07,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 17:00:07,351 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2022-07-21 17:00:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:07,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493821818] [2022-07-21 17:00:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493821818] [2022-07-21 17:00:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493821818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866502174] [2022-07-21 17:00:07,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:00:07,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:07,600 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) [2022-07-21 17:00:07,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 17:00:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 17:00:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:07,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:08,201 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 5 treesize of output 3 [2022-07-21 17:00:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866502174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:08,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:08,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2022-07-21 17:00:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773010866] [2022-07-21 17:00:08,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 17:00:08,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 17:00:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:00:08,251 INFO L87 Difference]: Start difference. First operand 475 states and 538 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 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) [2022-07-21 17:00:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:09,093 INFO L93 Difference]: Finished difference Result 796 states and 885 transitions. [2022-07-21 17:00:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:00:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 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) Word has length 61 [2022-07-21 17:00:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:09,096 INFO L225 Difference]: With dead ends: 796 [2022-07-21 17:00:09,096 INFO L226 Difference]: Without dead ends: 796 [2022-07-21 17:00:09,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 17:00:09,097 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 483 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:09,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 856 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:00:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-07-21 17:00:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 510. [2022-07-21 17:00:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.139763779527559) internal successors, (579), 509 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 579 transitions. [2022-07-21 17:00:09,109 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 579 transitions. Word has length 61 [2022-07-21 17:00:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:09,110 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 579 transitions. [2022-07-21 17:00:09,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 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) [2022-07-21 17:00:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 579 transitions. [2022-07-21 17:00:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 17:00:09,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:09,114 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:09,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:09,327 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2022-07-21 17:00:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:09,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991677966] [2022-07-21 17:00:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:09,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991677966] [2022-07-21 17:00:09,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991677966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159057108] [2022-07-21 17:00:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:00:09,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:09,712 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) [2022-07-21 17:00:09,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 17:00:09,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 17:00:09,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 17:00:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:09,828 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 [2022-07-21 17:00:10,000 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 [2022-07-21 17:00:10,045 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 [2022-07-21 17:00:10,191 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 [2022-07-21 17:00:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:10,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:10,345 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_672 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_672) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:00:10,348 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:10,349 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 [2022-07-21 17:00:10,353 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:10,354 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 [2022-07-21 17:00:10,356 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 [2022-07-21 17:00:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:10,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159057108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:10,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:10,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 44 [2022-07-21 17:00:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733766564] [2022-07-21 17:00:10,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 17:00:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 17:00:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2022-07-21 17:00:10,565 INFO L87 Difference]: Start difference. First operand 510 states and 579 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:11,794 INFO L93 Difference]: Finished difference Result 938 states and 1044 transitions. [2022-07-21 17:00:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 17:00:11,798 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-21 17:00:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:11,800 INFO L225 Difference]: With dead ends: 938 [2022-07-21 17:00:11,801 INFO L226 Difference]: Without dead ends: 798 [2022-07-21 17:00:11,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=4280, Unknown=1, NotChecked=132, Total=4692 [2022-07-21 17:00:11,802 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 193 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:11,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2123 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1970 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2022-07-21 17:00:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-07-21 17:00:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 574. [2022-07-21 17:00:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.1398601398601398) internal successors, (652), 573 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 652 transitions. [2022-07-21 17:00:11,820 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 652 transitions. Word has length 61 [2022-07-21 17:00:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:11,821 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 652 transitions. [2022-07-21 17:00:11,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 652 transitions. [2022-07-21 17:00:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 17:00:11,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:11,822 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:11,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:12,043 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2022-07-21 17:00:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232407742] [2022-07-21 17:00:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232407742] [2022-07-21 17:00:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232407742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729743947] [2022-07-21 17:00:12,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:00:12,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:12,225 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) [2022-07-21 17:00:12,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 17:00:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 17:00:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:12,773 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 5 treesize of output 3 [2022-07-21 17:00:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729743947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:12,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:12,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-07-21 17:00:12,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186997983] [2022-07-21 17:00:12,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:12,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:00:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:00:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:00:12,813 INFO L87 Difference]: Start difference. First operand 574 states and 652 transitions. Second operand has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:13,391 INFO L93 Difference]: Finished difference Result 861 states and 965 transitions. [2022-07-21 17:00:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:00:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 65 [2022-07-21 17:00:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:13,398 INFO L225 Difference]: With dead ends: 861 [2022-07-21 17:00:13,398 INFO L226 Difference]: Without dead ends: 861 [2022-07-21 17:00:13,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 17:00:13,399 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 372 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:13,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 947 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:00:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-07-21 17:00:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 640. [2022-07-21 17:00:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.141065830721003) internal successors, (728), 639 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 728 transitions. [2022-07-21 17:00:13,422 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 728 transitions. Word has length 65 [2022-07-21 17:00:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:13,422 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 728 transitions. [2022-07-21 17:00:13,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 728 transitions. [2022-07-21 17:00:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:00:13,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:13,424 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:13,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:13,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:13,642 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2022-07-21 17:00:13,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:13,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992049409] [2022-07-21 17:00:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:13,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:13,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992049409] [2022-07-21 17:00:13,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992049409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:13,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476903058] [2022-07-21 17:00:13,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:13,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:13,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:13,950 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) [2022-07-21 17:00:13,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 17:00:14,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:14,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:14,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 17:00:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:14,204 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 [2022-07-21 17:00:14,861 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:14,862 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 20 treesize of output 20 [2022-07-21 17:00:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:15,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:15,752 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 [2022-07-21 17:00:15,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 17:00:15,760 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 [2022-07-21 17:00:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476903058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:15,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:15,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 57 [2022-07-21 17:00:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419320810] [2022-07-21 17:00:15,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:15,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 17:00:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 17:00:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 17:00:15,812 INFO L87 Difference]: Start difference. First operand 640 states and 728 transitions. Second operand has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:18,309 INFO L93 Difference]: Finished difference Result 1303 states and 1451 transitions. [2022-07-21 17:00:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 17:00:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-21 17:00:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:18,313 INFO L225 Difference]: With dead ends: 1303 [2022-07-21 17:00:18,313 INFO L226 Difference]: Without dead ends: 1252 [2022-07-21 17:00:18,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=570, Invalid=7086, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 17:00:18,314 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 439 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:18,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2055 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1426 Invalid, 0 Unknown, 605 Unchecked, 0.5s Time] [2022-07-21 17:00:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-07-21 17:00:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 818. [2022-07-21 17:00:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 816 states have (on average 1.1397058823529411) internal successors, (930), 817 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 930 transitions. [2022-07-21 17:00:18,329 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 930 transitions. Word has length 66 [2022-07-21 17:00:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 930 transitions. [2022-07-21 17:00:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 930 transitions. [2022-07-21 17:00:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 17:00:18,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:18,332 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:18,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:18,543 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,SelfDestructingSolverStorable36 [2022-07-21 17:00:18,543 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2022-07-21 17:00:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368630717] [2022-07-21 17:00:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368630717] [2022-07-21 17:00:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368630717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555012231] [2022-07-21 17:00:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:19,044 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) [2022-07-21 17:00:19,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 17:00:19,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:19,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-21 17:00:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:19,188 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 [2022-07-21 17:00:19,539 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 [2022-07-21 17:00:19,589 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 [2022-07-21 17:00:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:21,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:21,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:21,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2022-07-21 17:00:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:21,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:21,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:21,986 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 53 treesize of output 42 [2022-07-21 17:00:21,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:22,004 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:22,005 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 76 treesize of output 83 [2022-07-21 17:00:22,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:22,019 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:22,019 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2022-07-21 17:00:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:22,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555012231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:22,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:22,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 29] total 71 [2022-07-21 17:00:22,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842688610] [2022-07-21 17:00:22,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:22,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-21 17:00:22,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-21 17:00:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4651, Unknown=55, NotChecked=0, Total=4970 [2022-07-21 17:00:22,884 INFO L87 Difference]: Start difference. First operand 818 states and 930 transitions. Second operand has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:24,901 INFO L93 Difference]: Finished difference Result 1560 states and 1762 transitions. [2022-07-21 17:00:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 17:00:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 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 73 [2022-07-21 17:00:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:24,904 INFO L225 Difference]: With dead ends: 1560 [2022-07-21 17:00:24,904 INFO L226 Difference]: Without dead ends: 1517 [2022-07-21 17:00:24,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2103 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=528, Invalid=10109, Unknown=75, NotChecked=0, Total=10712 [2022-07-21 17:00:24,906 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 310 mSDsluCounter, 3522 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 3634 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1464 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:24,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 3634 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1590 Invalid, 0 Unknown, 1464 Unchecked, 0.6s Time] [2022-07-21 17:00:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-07-21 17:00:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1282. [2022-07-21 17:00:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1280 states have (on average 1.1515625) internal successors, (1474), 1281 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1474 transitions. [2022-07-21 17:00:24,923 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1474 transitions. Word has length 73 [2022-07-21 17:00:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:24,923 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1474 transitions. [2022-07-21 17:00:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1474 transitions. [2022-07-21 17:00:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 17:00:24,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:24,927 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:24,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:25,149 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,SelfDestructingSolverStorable37 [2022-07-21 17:00:25,149 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:25,149 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 9 times [2022-07-21 17:00:25,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132306306] [2022-07-21 17:00:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:25,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132306306] [2022-07-21 17:00:25,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132306306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999928247] [2022-07-21 17:00:25,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:25,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:25,516 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) [2022-07-21 17:00:25,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 17:00:25,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-21 17:00:25,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 17:00:25,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:25,682 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:25,683 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 [2022-07-21 17:00:25,770 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 [2022-07-21 17:00:26,139 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:26,139 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 20 treesize of output 20 [2022-07-21 17:00:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:00:26,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:26,771 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 [2022-07-21 17:00:26,774 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 [2022-07-21 17:00:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:00:26,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999928247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:26,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:26,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10] total 43 [2022-07-21 17:00:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219058579] [2022-07-21 17:00:26,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 17:00:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:26,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 17:00:26,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 17:00:26,877 INFO L87 Difference]: Start difference. First operand 1282 states and 1474 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 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) [2022-07-21 17:00:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:28,645 INFO L93 Difference]: Finished difference Result 1693 states and 1921 transitions. [2022-07-21 17:00:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 17:00:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 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) Word has length 75 [2022-07-21 17:00:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:28,649 INFO L225 Difference]: With dead ends: 1693 [2022-07-21 17:00:28,650 INFO L226 Difference]: Without dead ends: 1558 [2022-07-21 17:00:28,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=593, Invalid=7963, Unknown=0, NotChecked=0, Total=8556 [2022-07-21 17:00:28,651 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:28,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 940 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 992 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-07-21 17:00:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-07-21 17:00:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1253. [2022-07-21 17:00:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1251 states have (on average 1.149480415667466) internal successors, (1438), 1252 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1438 transitions. [2022-07-21 17:00:28,668 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1438 transitions. Word has length 75 [2022-07-21 17:00:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:28,668 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1438 transitions. [2022-07-21 17:00:28,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 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) [2022-07-21 17:00:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1438 transitions. [2022-07-21 17:00:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 17:00:28,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:28,671 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:28,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-21 17:00:28,891 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,SelfDestructingSolverStorable38 [2022-07-21 17:00:28,891 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2022-07-21 17:00:28,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:28,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940002192] [2022-07-21 17:00:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940002192] [2022-07-21 17:00:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940002192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882568168] [2022-07-21 17:00:29,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:29,102 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) [2022-07-21 17:00:29,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 17:00:29,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 17:00:29,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 17:00:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:29,261 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:29,262 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 [2022-07-21 17:00:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:29,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:30,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882568168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:30,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:30,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-21 17:00:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653125345] [2022-07-21 17:00:30,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:30,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:00:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:00:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:00:30,156 INFO L87 Difference]: Start difference. First operand 1253 states and 1438 transitions. Second operand has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:31,117 INFO L93 Difference]: Finished difference Result 1717 states and 1961 transitions. [2022-07-21 17:00:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 17:00:31,118 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 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 77 [2022-07-21 17:00:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:31,122 INFO L225 Difference]: With dead ends: 1717 [2022-07-21 17:00:31,122 INFO L226 Difference]: Without dead ends: 1717 [2022-07-21 17:00:31,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 17:00:31,123 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 413 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:31,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 831 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:00:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-07-21 17:00:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1349. [2022-07-21 17:00:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1347 states have (on average 1.1499628804751298) internal successors, (1549), 1348 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1549 transitions. [2022-07-21 17:00:31,141 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1549 transitions. Word has length 77 [2022-07-21 17:00:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:31,142 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 1549 transitions. [2022-07-21 17:00:31,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1549 transitions. [2022-07-21 17:00:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 17:00:31,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:31,144 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:31,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:31,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:31,359 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 791104003, now seen corresponding path program 2 times [2022-07-21 17:00:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:31,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747437721] [2022-07-21 17:00:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:00:31,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747437721] [2022-07-21 17:00:31,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747437721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101446840] [2022-07-21 17:00:31,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:31,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:31,660 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) [2022-07-21 17:00:31,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 17:00:31,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 17:00:31,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:31,776 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:31,777 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 [2022-07-21 17:00:32,006 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 [2022-07-21 17:00:32,689 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:32,689 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 20 treesize of output 20 [2022-07-21 17:00:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:00:32,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:33,720 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 [2022-07-21 17:00:33,722 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 26 treesize of output 22 [2022-07-21 17:00:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 119 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:00:34,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101446840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:34,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:34,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2022-07-21 17:00:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406237630] [2022-07-21 17:00:34,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 17:00:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 17:00:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3886, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 17:00:34,418 INFO L87 Difference]: Start difference. First operand 1349 states and 1549 transitions. Second operand has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 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) [2022-07-21 17:00:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:37,158 INFO L93 Difference]: Finished difference Result 3068 states and 3505 transitions. [2022-07-21 17:00:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 17:00:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 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 78 [2022-07-21 17:00:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:37,164 INFO L225 Difference]: With dead ends: 3068 [2022-07-21 17:00:37,164 INFO L226 Difference]: Without dead ends: 2811 [2022-07-21 17:00:37,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1006, Invalid=12334, Unknown=0, NotChecked=0, Total=13340 [2022-07-21 17:00:37,165 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 618 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:37,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1804 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1304 Invalid, 0 Unknown, 400 Unchecked, 0.5s Time] [2022-07-21 17:00:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-07-21 17:00:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1757. [2022-07-21 17:00:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1755 states have (on average 1.1515669515669515) internal successors, (2021), 1756 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2021 transitions. [2022-07-21 17:00:37,196 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2021 transitions. Word has length 78 [2022-07-21 17:00:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:37,196 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2021 transitions. [2022-07-21 17:00:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 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) [2022-07-21 17:00:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2021 transitions. [2022-07-21 17:00:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:00:37,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:37,199 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:37,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 17:00:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:37,419 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1322263080, now seen corresponding path program 2 times [2022-07-21 17:00:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024237280] [2022-07-21 17:00:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024237280] [2022-07-21 17:00:38,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024237280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593462219] [2022-07-21 17:00:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:38,070 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) [2022-07-21 17:00:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 17:00:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-21 17:00:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:38,187 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 [2022-07-21 17:00:38,447 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 [2022-07-21 17:00:38,496 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 [2022-07-21 17:00:39,594 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:00:39,594 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 1 case distinctions, treesize of input 33 treesize of output 17 [2022-07-21 17:00:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:39,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:40,162 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_975 (Array Int Int)) (|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (let ((.cse0 (select v_ArrVal_975 |ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_975) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse0 0)))) is different from false [2022-07-21 17:00:40,167 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:40,167 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 26 treesize of output 27 [2022-07-21 17:00:40,173 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:40,173 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 44 treesize of output 44 [2022-07-21 17:00:40,179 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:40,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-07-21 17:00:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 123 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 17:00:40,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593462219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:40,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:40,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 70 [2022-07-21 17:00:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738363339] [2022-07-21 17:00:40,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-21 17:00:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-21 17:00:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4432, Unknown=1, NotChecked=134, Total=4830 [2022-07-21 17:00:40,474 INFO L87 Difference]: Start difference. First operand 1757 states and 2021 transitions. Second operand has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:41,723 INFO L93 Difference]: Finished difference Result 3098 states and 3570 transitions. [2022-07-21 17:00:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 17:00:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 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 82 [2022-07-21 17:00:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:41,730 INFO L225 Difference]: With dead ends: 3098 [2022-07-21 17:00:41,730 INFO L226 Difference]: Without dead ends: 3098 [2022-07-21 17:00:41,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=429, Invalid=7406, Unknown=1, NotChecked=174, Total=8010 [2022-07-21 17:00:41,731 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 189 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:41,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1585 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1440 Invalid, 0 Unknown, 335 Unchecked, 0.5s Time] [2022-07-21 17:00:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-07-21 17:00:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2667. [2022-07-21 17:00:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2665 states have (on average 1.1545966228893059) internal successors, (3077), 2666 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3077 transitions. [2022-07-21 17:00:41,767 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3077 transitions. Word has length 82 [2022-07-21 17:00:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:41,767 INFO L495 AbstractCegarLoop]: Abstraction has 2667 states and 3077 transitions. [2022-07-21 17:00:41,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3077 transitions. [2022-07-21 17:00:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:00:41,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:41,770 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:41,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-21 17:00:41,992 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 3 times [2022-07-21 17:00:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123334195] [2022-07-21 17:00:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:41,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:42,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123334195] [2022-07-21 17:00:42,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123334195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692046870] [2022-07-21 17:00:42,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:42,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:42,281 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) [2022-07-21 17:00:42,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 17:00:42,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 17:00:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:42,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-21 17:00:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:42,427 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 [2022-07-21 17:00:42,621 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 [2022-07-21 17:00:42,653 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 [2022-07-21 17:00:43,023 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:00:43,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 17:00:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:43,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:43,155 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1022) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:00:43,164 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:43,164 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 [2022-07-21 17:00:43,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:43,169 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 [2022-07-21 17:00:43,172 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 [2022-07-21 17:00:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:00:43,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692046870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:43,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:43,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 40 [2022-07-21 17:00:43,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697234694] [2022-07-21 17:00:43,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:43,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 17:00:43,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 17:00:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1374, Unknown=1, NotChecked=74, Total=1560 [2022-07-21 17:00:43,370 INFO L87 Difference]: Start difference. First operand 2667 states and 3077 transitions. Second operand has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:43,932 INFO L93 Difference]: Finished difference Result 2524 states and 2863 transitions. [2022-07-21 17:00:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 17:00:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 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 82 [2022-07-21 17:00:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:43,936 INFO L225 Difference]: With dead ends: 2524 [2022-07-21 17:00:43,936 INFO L226 Difference]: Without dead ends: 1699 [2022-07-21 17:00:43,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=2455, Unknown=1, NotChecked=100, Total=2756 [2022-07-21 17:00:43,936 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 92 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:43,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1460 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 712 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-07-21 17:00:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-07-21 17:00:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1150. [2022-07-21 17:00:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1148 states have (on average 1.1402439024390243) internal successors, (1309), 1149 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1309 transitions. [2022-07-21 17:00:43,950 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1309 transitions. Word has length 82 [2022-07-21 17:00:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1309 transitions. [2022-07-21 17:00:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1309 transitions. [2022-07-21 17:00:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 17:00:43,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:43,953 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:43,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:44,167 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,SelfDestructingSolverStorable42 [2022-07-21 17:00:44,167 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:00:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 10 times [2022-07-21 17:00:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915314275] [2022-07-21 17:00:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:44,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:44,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915314275] [2022-07-21 17:00:44,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915314275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:44,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394037569] [2022-07-21 17:00:44,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:00:44,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:44,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:44,704 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) [2022-07-21 17:00:44,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 17:00:44,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:00:44,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-21 17:00:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:44,844 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:44,845 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 [2022-07-21 17:00:44,855 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 [2022-07-21 17:00:45,250 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 [2022-07-21 17:00:45,296 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 [2022-07-21 17:00:59,701 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 13 treesize of output 9 [2022-07-21 17:00:59,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:59,946 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2022-07-21 17:01:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 77 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:00,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:01,179 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:01,180 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 24 treesize of output 25 [2022-07-21 17:01:01,186 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:01,186 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 40 treesize of output 40 [2022-07-21 17:01:01,193 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:01,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-07-21 17:01:02,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:01:02,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:01:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 102 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:02,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394037569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:02,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:02,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 77 [2022-07-21 17:01:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162172152] [2022-07-21 17:01:02,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:02,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-21 17:01:02,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-21 17:01:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=5445, Unknown=1, NotChecked=0, Total=5852 [2022-07-21 17:01:02,014 INFO L87 Difference]: Start difference. First operand 1150 states and 1309 transitions. Second operand has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:39,009 INFO L93 Difference]: Finished difference Result 1513 states and 1706 transitions. [2022-07-21 17:02:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-21 17:02:39,010 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 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 85 [2022-07-21 17:02:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:39,012 INFO L225 Difference]: With dead ends: 1513 [2022-07-21 17:02:39,012 INFO L226 Difference]: Without dead ends: 1462 [2022-07-21 17:02:39,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5347 ImplicationChecksByTransitivity, 112.6s TimeCoverageRelationStatistics Valid=1798, Invalid=20522, Unknown=30, NotChecked=0, Total=22350 [2022-07-21 17:02:39,014 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 360 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:39,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1462 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 856 Invalid, 0 Unknown, 295 Unchecked, 0.4s Time] [2022-07-21 17:02:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-07-21 17:02:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1359. [2022-07-21 17:02:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1357 states have (on average 1.1363301400147383) internal successors, (1542), 1358 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1542 transitions. [2022-07-21 17:02:39,028 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1542 transitions. Word has length 85 [2022-07-21 17:02:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:39,028 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1542 transitions. [2022-07-21 17:02:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1542 transitions. [2022-07-21 17:02:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 17:02:39,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:39,031 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:39,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:39,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:39,247 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:02:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1453961489, now seen corresponding path program 3 times [2022-07-21 17:02:39,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:39,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644096322] [2022-07-21 17:02:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:02:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644096322] [2022-07-21 17:02:39,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644096322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18663126] [2022-07-21 17:02:39,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:39,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:39,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:39,620 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) [2022-07-21 17:02:39,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 17:02:39,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-21 17:02:39,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-21 17:02:39,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:40,062 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 [2022-07-21 17:02:40,324 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 [2022-07-21 17:02:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:02:40,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:40,473 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 [2022-07-21 17:02:40,475 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 [2022-07-21 17:02:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:02:40,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18663126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:40,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:40,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 43 [2022-07-21 17:02:40,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169385086] [2022-07-21 17:02:40,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:40,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 17:02:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 17:02:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 17:02:40,660 INFO L87 Difference]: Start difference. First operand 1359 states and 1542 transitions. Second operand has 43 states, 43 states have (on average 3.488372093023256) internal successors, (150), 43 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) [2022-07-21 17:02:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:41,921 INFO L93 Difference]: Finished difference Result 2269 states and 2535 transitions. [2022-07-21 17:02:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:02:41,923 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.488372093023256) internal successors, (150), 43 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 87 [2022-07-21 17:02:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:41,926 INFO L225 Difference]: With dead ends: 2269 [2022-07-21 17:02:41,926 INFO L226 Difference]: Without dead ends: 1897 [2022-07-21 17:02:41,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=427, Invalid=3733, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 17:02:41,927 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 507 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:41,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 2158 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1814 Invalid, 0 Unknown, 147 Unchecked, 0.7s Time] [2022-07-21 17:02:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-07-21 17:02:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1422. [2022-07-21 17:02:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1420 states have (on average 1.134507042253521) internal successors, (1611), 1421 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1611 transitions. [2022-07-21 17:02:41,939 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1611 transitions. Word has length 87 [2022-07-21 17:02:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:41,939 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1611 transitions. [2022-07-21 17:02:41,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.488372093023256) internal successors, (150), 43 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) [2022-07-21 17:02:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1611 transitions. [2022-07-21 17:02:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 17:02:41,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:41,941 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:41,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:42,155 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:02:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 303608411, now seen corresponding path program 11 times [2022-07-21 17:02:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:42,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081247830] [2022-07-21 17:02:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:02:42,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:42,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081247830] [2022-07-21 17:02:42,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081247830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:42,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75521626] [2022-07-21 17:02:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:02:42,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:42,398 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) [2022-07-21 17:02:42,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 17:02:42,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 17:02:42,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:42,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 17:02:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:02:42,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:43,170 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 [2022-07-21 17:02:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:02:43,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75521626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:43,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:43,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-07-21 17:02:43,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973842354] [2022-07-21 17:02:43,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:43,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 17:02:43,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:43,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 17:02:43,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 17:02:43,468 INFO L87 Difference]: Start difference. First operand 1422 states and 1611 transitions. Second operand has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:44,327 INFO L93 Difference]: Finished difference Result 2503 states and 2842 transitions. [2022-07-21 17:02:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 17:02:44,327 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 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 89 [2022-07-21 17:02:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:44,333 INFO L225 Difference]: With dead ends: 2503 [2022-07-21 17:02:44,333 INFO L226 Difference]: Without dead ends: 2503 [2022-07-21 17:02:44,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=898, Invalid=3392, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 17:02:44,334 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 503 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:44,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1319 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:02:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-07-21 17:02:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1559. [2022-07-21 17:02:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1557 states have (on average 1.1361592806679512) internal successors, (1769), 1558 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 1769 transitions. [2022-07-21 17:02:44,349 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 1769 transitions. Word has length 89 [2022-07-21 17:02:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:44,350 INFO L495 AbstractCegarLoop]: Abstraction has 1559 states and 1769 transitions. [2022-07-21 17:02:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 1769 transitions. [2022-07-21 17:02:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 17:02:44,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:44,352 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:44,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:44,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:44,579 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:02:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1418653548, now seen corresponding path program 4 times [2022-07-21 17:02:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:44,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331479407] [2022-07-21 17:02:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 45 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:02:44,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331479407] [2022-07-21 17:02:44,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331479407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13063278] [2022-07-21 17:02:44,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:02:44,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:44,889 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) [2022-07-21 17:02:44,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 17:02:45,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:02:45,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 17:02:45,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:45,022 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:45,022 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 [2022-07-21 17:02:45,348 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 16 treesize of output 12 [2022-07-21 17:02:45,917 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:45,918 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 21 treesize of output 21 [2022-07-21 17:02:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 72 proven. 175 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:02:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:47,035 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 [2022-07-21 17:02:47,039 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 [2022-07-21 17:02:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:02:48,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13063278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:48,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:48,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 69 [2022-07-21 17:02:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770963880] [2022-07-21 17:02:48,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:48,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-21 17:02:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-21 17:02:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=4391, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 17:02:48,082 INFO L87 Difference]: Start difference. First operand 1559 states and 1769 transitions. Second operand has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:52,437 INFO L93 Difference]: Finished difference Result 2688 states and 3008 transitions. [2022-07-21 17:02:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 17:02:52,437 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-21 17:02:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:52,443 INFO L225 Difference]: With dead ends: 2688 [2022-07-21 17:02:52,443 INFO L226 Difference]: Without dead ends: 2688 [2022-07-21 17:02:52,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3070, Invalid=12680, Unknown=0, NotChecked=0, Total=15750 [2022-07-21 17:02:52,445 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1146 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:52,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 1616 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2335 Invalid, 0 Unknown, 159 Unchecked, 1.1s Time] [2022-07-21 17:02:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2022-07-21 17:02:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1659. [2022-07-21 17:02:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1657 states have (on average 1.1388050694025347) internal successors, (1887), 1658 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 1887 transitions. [2022-07-21 17:02:52,461 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 1887 transitions. Word has length 91 [2022-07-21 17:02:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:52,462 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 1887 transitions. [2022-07-21 17:02:52,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 1887 transitions. [2022-07-21 17:02:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 17:02:52,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:52,463 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:52,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-21 17:02:52,679 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,SelfDestructingSolverStorable46 [2022-07-21 17:02:52,679 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:02:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -157062976, now seen corresponding path program 4 times [2022-07-21 17:02:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102901598] [2022-07-21 17:02:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 17:02:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102901598] [2022-07-21 17:02:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102901598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652289351] [2022-07-21 17:02:53,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:02:53,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:53,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:53,218 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) [2022-07-21 17:02:53,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 17:02:53,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:02:53,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-21 17:02:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:53,395 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:53,396 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 [2022-07-21 17:02:54,176 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 13 treesize of output 9 [2022-07-21 17:02:54,258 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:54,259 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 17:02:54,264 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 3 [2022-07-21 17:02:56,410 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:02:56,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-07-21 17:02:56,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:02:56,663 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-21 17:02:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 114 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:02:56,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:58,207 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:58,208 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 24 treesize of output 25 [2022-07-21 17:02:58,215 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:58,215 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 40 treesize of output 40 [2022-07-21 17:02:58,221 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:58,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-07-21 17:02:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 88 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:02:59,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652289351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:59,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:59,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 35, 35] total 90 [2022-07-21 17:02:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771077773] [2022-07-21 17:02:59,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:59,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-21 17:02:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-21 17:02:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=7465, Unknown=13, NotChecked=0, Total=8010 [2022-07-21 17:02:59,530 INFO L87 Difference]: Start difference. First operand 1659 states and 1887 transitions. Second operand has 90 states, 90 states have (on average 2.7555555555555555) internal successors, (248), 90 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:07,220 INFO L93 Difference]: Finished difference Result 3282 states and 3752 transitions. [2022-07-21 17:03:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-07-21 17:03:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.7555555555555555) internal successors, (248), 90 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-21 17:03:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:07,225 INFO L225 Difference]: With dead ends: 3282 [2022-07-21 17:03:07,225 INFO L226 Difference]: Without dead ends: 3282 [2022-07-21 17:03:07,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12127 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2875, Invalid=39342, Unknown=13, NotChecked=0, Total=42230 [2022-07-21 17:03:07,228 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 786 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 2888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1522 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:07,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 1265 Invalid, 2888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1213 Invalid, 0 Unknown, 1522 Unchecked, 0.6s Time] [2022-07-21 17:03:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-07-21 17:03:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 2788. [2022-07-21 17:03:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2786 states have (on average 1.1500358937544868) internal successors, (3204), 2787 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3204 transitions. [2022-07-21 17:03:07,257 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 3204 transitions. Word has length 94 [2022-07-21 17:03:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:07,258 INFO L495 AbstractCegarLoop]: Abstraction has 2788 states and 3204 transitions. [2022-07-21 17:03:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.7555555555555555) internal successors, (248), 90 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 3204 transitions. [2022-07-21 17:03:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 17:03:07,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:07,260 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:07,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:07,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-21 17:03:07,461 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:03:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1786250318, now seen corresponding path program 5 times [2022-07-21 17:03:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:07,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100532256] [2022-07-21 17:03:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 191 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:03:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100532256] [2022-07-21 17:03:07,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100532256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257272453] [2022-07-21 17:03:07,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:03:07,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:07,832 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) [2022-07-21 17:03:07,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 17:03:07,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 17:03:07,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-21 17:03:07,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:07,994 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 [2022-07-21 17:03:08,249 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 [2022-07-21 17:03:08,302 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 [2022-07-21 17:03:08,934 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:08,935 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 17 [2022-07-21 17:03:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 29 proven. 174 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:03:09,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:09,996 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:09,996 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 [2022-07-21 17:03:10,000 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:10,001 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 [2022-07-21 17:03:10,003 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 [2022-07-21 17:03:10,012 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 [2022-07-21 17:03:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 28 proven. 175 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:03:10,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257272453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:10,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:10,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 63 [2022-07-21 17:03:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640775227] [2022-07-21 17:03:10,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 17:03:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 17:03:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3607, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 17:03:10,494 INFO L87 Difference]: Start difference. First operand 2788 states and 3204 transitions. Second operand has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:14,126 INFO L93 Difference]: Finished difference Result 4247 states and 4796 transitions. [2022-07-21 17:03:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-21 17:03:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 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 94 [2022-07-21 17:03:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:14,131 INFO L225 Difference]: With dead ends: 4247 [2022-07-21 17:03:14,131 INFO L226 Difference]: Without dead ends: 2783 [2022-07-21 17:03:14,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1447, Invalid=16375, Unknown=0, NotChecked=0, Total=17822 [2022-07-21 17:03:14,133 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 447 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:14,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 2775 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1776 Invalid, 0 Unknown, 250 Unchecked, 0.8s Time] [2022-07-21 17:03:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-07-21 17:03:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1500. [2022-07-21 17:03:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1498 states have (on average 1.1428571428571428) internal successors, (1712), 1499 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1712 transitions. [2022-07-21 17:03:14,154 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1712 transitions. Word has length 94 [2022-07-21 17:03:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:14,154 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 1712 transitions. [2022-07-21 17:03:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1712 transitions. [2022-07-21 17:03:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 17:03:14,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:14,156 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:14,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:14,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 17:03:14,379 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:03:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2077401446, now seen corresponding path program 12 times [2022-07-21 17:03:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:14,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209998294] [2022-07-21 17:03:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:14,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209998294] [2022-07-21 17:03:14,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209998294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294203767] [2022-07-21 17:03:14,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:03:14,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:14,953 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) [2022-07-21 17:03:14,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 17:03:15,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 17:03:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 149 conjunts are in the unsatisfiable core [2022-07-21 17:03:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:15,156 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 [2022-07-21 17:03:15,552 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 [2022-07-21 17:03:15,605 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 [2022-07-21 17:03:17,289 INFO L356 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-07-21 17:03:17,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2022-07-21 17:03:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:17,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:18,309 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse0 (select v_ArrVal_1370 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 (select .cse1 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse1 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)) (= .cse0 0)))) is different from false [2022-07-21 17:03:18,314 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:18,314 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 53 treesize of output 42 [2022-07-21 17:03:18,328 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-21 17:03:18,328 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 76 treesize of output 73 [2022-07-21 17:03:18,344 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-07-21 17:03:18,344 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 58 treesize of output 60 [2022-07-21 17:03:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 30 proven. 218 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:19,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294203767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:19,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:19,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 85 [2022-07-21 17:03:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902037648] [2022-07-21 17:03:19,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-21 17:03:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-21 17:03:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=6643, Unknown=1, NotChecked=164, Total=7140 [2022-07-21 17:03:19,155 INFO L87 Difference]: Start difference. First operand 1500 states and 1712 transitions. Second operand has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:20,913 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (and .cse0 (= 7 |c_ULTIMATE.start_main_~length1~0#1|)) (and .cse0 (= 5 |c_ULTIMATE.start_main_~length1~0#1|))) .cse0 (= |c_ULTIMATE.start_main_~i~0#1| 4) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_1370 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse1 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse2 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= .cse3 (select .cse4 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse3 0) (not (= .cse3 (select .cse4 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-07-21 17:03:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:22,394 INFO L93 Difference]: Finished difference Result 3295 states and 3747 transitions. [2022-07-21 17:03:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 17:03:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-21 17:03:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:22,398 INFO L225 Difference]: With dead ends: 3295 [2022-07-21 17:03:22,398 INFO L226 Difference]: Without dead ends: 3236 [2022-07-21 17:03:22,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=725, Invalid=15793, Unknown=2, NotChecked=510, Total=17030 [2022-07-21 17:03:22,399 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 382 mSDsluCounter, 4298 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 4433 SdHoareTripleChecker+Invalid, 3631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1003 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:22,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 4433 Invalid, 3631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2600 Invalid, 0 Unknown, 1003 Unchecked, 1.0s Time] [2022-07-21 17:03:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2022-07-21 17:03:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2698. [2022-07-21 17:03:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2696 states have (on average 1.1498516320474776) internal successors, (3100), 2697 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 3100 transitions. [2022-07-21 17:03:22,426 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 3100 transitions. Word has length 97 [2022-07-21 17:03:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:22,426 INFO L495 AbstractCegarLoop]: Abstraction has 2698 states and 3100 transitions. [2022-07-21 17:03:22,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 3100 transitions. [2022-07-21 17:03:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 17:03:22,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:22,429 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:22,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:22,647 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,SelfDestructingSolverStorable49 [2022-07-21 17:03:22,647 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:03:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash -82780620, now seen corresponding path program 5 times [2022-07-21 17:03:22,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:22,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287558765] [2022-07-21 17:03:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:22,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 180 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:03:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287558765] [2022-07-21 17:03:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287558765] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678959824] [2022-07-21 17:03:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:03:22,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:22,938 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) [2022-07-21 17:03:22,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 17:03:23,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-21 17:03:23,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:23,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-21 17:03:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:23,110 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:03:23,110 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 [2022-07-21 17:03:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 195 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:03:23,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 195 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:03:24,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678959824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:24,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:24,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 58 [2022-07-21 17:03:24,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777993526] [2022-07-21 17:03:24,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:24,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 17:03:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 17:03:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 17:03:24,170 INFO L87 Difference]: Start difference. First operand 2698 states and 3100 transitions. Second operand has 58 states, 58 states have (on average 4.120689655172414) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:26,227 INFO L93 Difference]: Finished difference Result 5881 states and 6582 transitions. [2022-07-21 17:03:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 17:03:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.120689655172414) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 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 101 [2022-07-21 17:03:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:26,233 INFO L225 Difference]: With dead ends: 5881 [2022-07-21 17:03:26,233 INFO L226 Difference]: Without dead ends: 5281 [2022-07-21 17:03:26,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3996 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3282, Invalid=10998, Unknown=0, NotChecked=0, Total=14280 [2022-07-21 17:03:26,235 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 423 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:26,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1345 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:03:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2022-07-21 17:03:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 3408. [2022-07-21 17:03:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3408 states, 3406 states have (on average 1.1514973576042278) internal successors, (3922), 3407 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 3922 transitions. [2022-07-21 17:03:26,291 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 3922 transitions. Word has length 101 [2022-07-21 17:03:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:26,291 INFO L495 AbstractCegarLoop]: Abstraction has 3408 states and 3922 transitions. [2022-07-21 17:03:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.120689655172414) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 3922 transitions. [2022-07-21 17:03:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 17:03:26,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:26,295 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:26,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:26,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:26,510 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 17:03:26,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1316555287, now seen corresponding path program 13 times [2022-07-21 17:03:26,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:26,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75051367] [2022-07-21 17:03:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:26,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75051367] [2022-07-21 17:03:26,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75051367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:26,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412110512] [2022-07-21 17:03:26,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:03:26,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:26,816 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) [2022-07-21 17:03:26,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 17:03:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 17:03:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:27,301 INFO L328 TraceCheckSpWp]: Computing backward predicates...