./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:20:42,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:20:42,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:20:42,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:20:42,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:20:42,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:20:42,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:20:42,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:20:42,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:20:42,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:20:42,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:20:42,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:20:42,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:20:42,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:20:42,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:20:42,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:20:42,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:20:42,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:20:42,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:20:42,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:20:42,258 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:20:42,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:20:42,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:20:42,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:20:42,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:20:42,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:20:42,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:20:42,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:20:42,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:20:42,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:20:42,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:20:42,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:20:42,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:20:42,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:20:42,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:20:42,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:20:42,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:20:42,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:20:42,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:20:42,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:20:42,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:20:42,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:20:42,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:20:42,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:20:42,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:20:42,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:20:42,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:20:42,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:20:42,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:20:42,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:20:42,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:20:42,303 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:20:42,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:20:42,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:20:42,305 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:20:42,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:20:42,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:20:42,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:20:42,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:20:42,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:20:42,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:20:42,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:20:42,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:20:42,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:20:42,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:20:42,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:20:42,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:20:42,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:20:42,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:20:42,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:20:42,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:20:42,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:20:42,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:20:42,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2022-07-20 05:20:42,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:20:42,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:20:42,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:20:42,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:20:42,583 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:20:42,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2022-07-20 05:20:42,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e590edd/95a252aed352403b81c948e9c3106c2b/FLAG02fad0ad8 [2022-07-20 05:20:43,038 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:20:43,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2022-07-20 05:20:43,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e590edd/95a252aed352403b81c948e9c3106c2b/FLAG02fad0ad8 [2022-07-20 05:20:43,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e590edd/95a252aed352403b81c948e9c3106c2b [2022-07-20 05:20:43,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:20:43,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:20:43,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:20:43,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:20:43,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:20:43,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6483a324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43, skipping insertion in model container [2022-07-20 05:20:43,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:20:43,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:20:43,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:20:43,756 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:20:43,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:20:43,815 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:20:43,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43 WrapperNode [2022-07-20 05:20:43,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:20:43,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:20:43,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:20:43,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:20:43,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,858 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-07-20 05:20:43,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:20:43,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:20:43,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:20:43,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:20:43,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:20:43,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:20:43,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:20:43,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:20:43,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (1/1) ... [2022-07-20 05:20:43,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:20:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:43,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 05:20:43,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 05:20:43,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:20:43,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:20:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:20:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:20:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:20:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:20:44,014 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:20:44,016 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:20:44,272 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:20:44,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:20:44,279 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 05:20:44,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:20:44 BoogieIcfgContainer [2022-07-20 05:20:44,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:20:44,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:20:44,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:20:44,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:20:44,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:20:43" (1/3) ... [2022-07-20 05:20:44,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce12456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:20:44, skipping insertion in model container [2022-07-20 05:20:44,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:20:43" (2/3) ... [2022-07-20 05:20:44,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce12456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:20:44, skipping insertion in model container [2022-07-20 05:20:44,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:20:44" (3/3) ... [2022-07-20 05:20:44,292 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2022-07-20 05:20:44,304 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:20:44,304 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-20 05:20:44,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:20:44,357 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@1405a9d3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@401e1fac [2022-07-20 05:20:44,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-20 05:20:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) 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) [2022-07-20 05:20:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:20:44,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:44,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:44,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-20 05:20:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:44,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135322612] [2022-07-20 05:20:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:44,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:44,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:44,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135322612] [2022-07-20 05:20:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135322612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:44,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:44,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:20:44,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871595537] [2022-07-20 05:20:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:44,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:20:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:20:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:20:44,632 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) 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) 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) [2022-07-20 05:20:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:44,701 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-20 05:20:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:20:44,703 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 [2022-07-20 05:20:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:44,708 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:20:44,709 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:20:44,711 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 [2022-07-20 05:20:44,716 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 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 [2022-07-20 05:20:44,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:20:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-07-20 05:20:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-20 05:20:44,752 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-07-20 05:20:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:44,753 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-20 05:20:44,753 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) [2022-07-20 05:20:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-20 05:20:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:20:44,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:44,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:44,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:20:44,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-20 05:20:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990752078] [2022-07-20 05:20:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:44,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:44,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990752078] [2022-07-20 05:20:44,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990752078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:44,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:44,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:20:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170607757] [2022-07-20 05:20:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:20:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:20:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:20:44,820 INFO L87 Difference]: Start difference. First operand 55 states and 63 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) [2022-07-20 05:20:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:44,871 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-20 05:20:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:20:44,872 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 [2022-07-20 05:20:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:44,875 INFO L225 Difference]: With dead ends: 53 [2022-07-20 05:20:44,875 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 05:20:44,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:20:44,882 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:44,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 05:20:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-20 05:20:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-20 05:20:44,902 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-20 05:20:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:44,902 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-20 05:20:44,903 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) [2022-07-20 05:20:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-20 05:20:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:20:44,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:44,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:20:44,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-20 05:20:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:44,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045273659] [2022-07-20 05:20:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045273659] [2022-07-20 05:20:45,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045273659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:45,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:45,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:20:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296262032] [2022-07-20 05:20:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:45,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:20:45,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:20:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:20:45,033 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:45,173 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-20 05:20:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:20:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:20:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:45,180 INFO L225 Difference]: With dead ends: 97 [2022-07-20 05:20:45,180 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 05:20:45,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:20:45,188 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:45,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 96 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 05:20:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-07-20 05:20:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 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) [2022-07-20 05:20:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-20 05:20:45,202 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-07-20 05:20:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:45,202 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-20 05:20:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-20 05:20:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:20:45,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:45,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:20:45,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-20 05:20:45,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445828029] [2022-07-20 05:20:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445828029] [2022-07-20 05:20:45,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445828029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:45,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:45,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:20:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161225475] [2022-07-20 05:20:45,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:45,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:20:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:45,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:20:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:20:45,274 INFO L87 Difference]: Start difference. First operand 55 states and 64 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) [2022-07-20 05:20:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:45,312 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-20 05:20:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:20:45,312 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 [2022-07-20 05:20:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:45,313 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:20:45,313 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 05:20:45,314 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 [2022-07-20 05:20:45,314 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:45,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 05:20:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-20 05:20:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-20 05:20:45,319 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2022-07-20 05:20:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:45,319 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-20 05:20:45,320 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) [2022-07-20 05:20:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-20 05:20:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:20:45,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:45,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:20:45,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-20 05:20:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005033606] [2022-07-20 05:20:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005033606] [2022-07-20 05:20:45,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005033606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:45,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:45,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:20:45,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742795022] [2022-07-20 05:20:45,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:20:45,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:20:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:20:45,360 INFO L87 Difference]: Start difference. First operand 54 states and 63 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) [2022-07-20 05:20:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:45,382 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-20 05:20:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:20:45,382 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 [2022-07-20 05:20:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:45,383 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:20:45,383 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:20:45,384 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 [2022-07-20 05:20:45,384 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:45,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:20:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-20 05:20:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-07-20 05:20:45,389 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-07-20 05:20:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:45,390 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-07-20 05:20:45,390 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) [2022-07-20 05:20:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-07-20 05:20:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:20:45,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:45,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:20:45,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-20 05:20:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42178992] [2022-07-20 05:20:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42178992] [2022-07-20 05:20:45,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42178992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:45,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:45,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:20:45,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861661541] [2022-07-20 05:20:45,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:45,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:20:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:45,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:20:45,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:20:45,419 INFO L87 Difference]: Start difference. First operand 65 states and 77 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) [2022-07-20 05:20:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:45,449 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-07-20 05:20:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:20:45,449 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 [2022-07-20 05:20:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:45,450 INFO L225 Difference]: With dead ends: 63 [2022-07-20 05:20:45,450 INFO L226 Difference]: Without dead ends: 63 [2022-07-20 05:20:45,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:20:45,451 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:45,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-20 05:20:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-20 05:20:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-20 05:20:45,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-20 05:20:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:45,455 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-20 05:20:45,455 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) [2022-07-20 05:20:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-20 05:20:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:20:45,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:45,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:45,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:20:45,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-20 05:20:45,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949442871] [2022-07-20 05:20:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949442871] [2022-07-20 05:20:45,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949442871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:45,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:45,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:20:45,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947110176] [2022-07-20 05:20:45,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:45,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:20:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:20:45,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:20:45,534 INFO L87 Difference]: Start difference. First operand 63 states and 75 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) [2022-07-20 05:20:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:45,624 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-20 05:20:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:20:45,625 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 [2022-07-20 05:20:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:45,626 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:20:45,626 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:20:45,626 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 [2022-07-20 05:20:45,627 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:45,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:20:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-20 05:20:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-07-20 05:20:45,631 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2022-07-20 05:20:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:45,632 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-07-20 05:20:45,632 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) [2022-07-20 05:20:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-07-20 05:20:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:20:45,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:45,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:45,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:20:45,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-20 05:20:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648913529] [2022-07-20 05:20:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648913529] [2022-07-20 05:20:45,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648913529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:45,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:45,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:20:45,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015735091] [2022-07-20 05:20:45,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:45,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:20:45,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:20:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:20:45,686 INFO L87 Difference]: Start difference. First operand 65 states and 78 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) [2022-07-20 05:20:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:45,712 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-20 05:20:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:20:45,712 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 [2022-07-20 05:20:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:45,713 INFO L225 Difference]: With dead ends: 64 [2022-07-20 05:20:45,713 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 05:20:45,714 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 [2022-07-20 05:20:45,714 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:45,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 05:20:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-20 05:20:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-20 05:20:45,718 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2022-07-20 05:20:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:45,718 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-20 05:20:45,719 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) [2022-07-20 05:20:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-20 05:20:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:20:45,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:45,719 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:45,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:20:45,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-20 05:20:45,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:45,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134871593] [2022-07-20 05:20:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:45,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:45,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134871593] [2022-07-20 05:20:45,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134871593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:45,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127502248] [2022-07-20 05:20:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:45,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:45,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:45,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:45,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:20:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:20:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:45,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:45,994 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 [2022-07-20 05:20:46,002 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 [2022-07-20 05:20:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:46,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:46,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127502248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:46,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:46,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-20 05:20:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128533031] [2022-07-20 05:20:46,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:20:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:20:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:20:46,204 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:46,394 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-07-20 05:20:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:20:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 05:20:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:46,395 INFO L225 Difference]: With dead ends: 149 [2022-07-20 05:20:46,396 INFO L226 Difference]: Without dead ends: 149 [2022-07-20 05:20:46,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:20:46,398 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 207 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:46,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 281 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-20 05:20:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2022-07-20 05:20:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-20 05:20:46,412 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2022-07-20 05:20:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:46,412 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-20 05:20:46,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-20 05:20:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:20:46,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:46,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:46,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:46,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-07-20 05:20:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475974757] [2022-07-20 05:20:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:46,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475974757] [2022-07-20 05:20:46,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475974757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:46,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:46,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:20:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705051945] [2022-07-20 05:20:46,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:20:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:20:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:20:46,685 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:46,714 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-20 05:20:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:20:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 05:20:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:46,715 INFO L225 Difference]: With dead ends: 57 [2022-07-20 05:20:46,716 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 05:20:46,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:20:46,716 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:46,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 05:20:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-20 05:20:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 05:20:46,719 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-20 05:20:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:46,719 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 05:20:46,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 05:20:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:20:46,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:46,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:46,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:20:46,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-20 05:20:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712619112] [2022-07-20 05:20:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712619112] [2022-07-20 05:20:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712619112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:46,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:46,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:20:46,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244177965] [2022-07-20 05:20:46,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:46,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:20:46,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:20:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:20:46,807 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:46,869 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-20 05:20:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:20:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 05:20:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:46,871 INFO L225 Difference]: With dead ends: 80 [2022-07-20 05:20:46,871 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 05:20:46,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:20:46,872 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:46,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 64 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 05:20:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-20 05:20:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-20 05:20:46,874 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2022-07-20 05:20:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:46,875 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-20 05:20:46,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-20 05:20:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:20:46,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:46,876 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:46,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 05:20:46,876 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-20 05:20:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:46,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553793090] [2022-07-20 05:20:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553793090] [2022-07-20 05:20:46,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553793090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940966642] [2022-07-20 05:20:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:46,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:46,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:46,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:46,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:20:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:20:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:47,017 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:47,018 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 [2022-07-20 05:20:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:47,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940966642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:47,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:47,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-20 05:20:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876391521] [2022-07-20 05:20:47,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:47,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:20:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:20:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:20:47,239 INFO L87 Difference]: Start difference. First operand 60 states and 71 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) [2022-07-20 05:20:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:47,418 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-07-20 05:20:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:20:47,419 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 [2022-07-20 05:20:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:47,419 INFO L225 Difference]: With dead ends: 124 [2022-07-20 05:20:47,420 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 05:20:47,420 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 [2022-07-20 05:20:47,420 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:47,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 232 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 05:20:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2022-07-20 05:20:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 05:20:47,423 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2022-07-20 05:20:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:47,423 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 05:20:47,424 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) [2022-07-20 05:20:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 05:20:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:20:47,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:47,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:47,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:47,651 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,SelfDestructingSolverStorable11 [2022-07-20 05:20:47,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-07-20 05:20:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:47,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026293809] [2022-07-20 05:20:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:47,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:47,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026293809] [2022-07-20 05:20:47,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026293809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:47,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:47,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:20:47,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884900138] [2022-07-20 05:20:47,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:47,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:20:47,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:20:47,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:20:47,744 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:47,769 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-20 05:20:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:20:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:20:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:47,770 INFO L225 Difference]: With dead ends: 56 [2022-07-20 05:20:47,770 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 05:20:47,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:20:47,771 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:47,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 05:20:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-20 05:20:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-20 05:20:47,773 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-20 05:20:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:47,774 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-20 05:20:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-20 05:20:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:20:47,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:47,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:47,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 05:20:47,775 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-07-20 05:20:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:47,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238028587] [2022-07-20 05:20:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238028587] [2022-07-20 05:20:47,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238028587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:47,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:47,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:20:47,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750639048] [2022-07-20 05:20:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:47,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:20:47,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:20:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:20:47,807 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:47,844 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-20 05:20:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:20:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:20:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:47,845 INFO L225 Difference]: With dead ends: 50 [2022-07-20 05:20:47,845 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 05:20:47,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:20:47,846 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:47,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 05:20:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-20 05:20:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-20 05:20:47,848 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-07-20 05:20:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:47,848 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-20 05:20:47,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-20 05:20:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:20:47,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:47,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 05:20:47,850 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-07-20 05:20:47,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:47,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938416223] [2022-07-20 05:20:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:47,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:47,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938416223] [2022-07-20 05:20:47,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938416223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:47,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:47,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:20:47,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080117273] [2022-07-20 05:20:47,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:47,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:20:47,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:20:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:20:47,919 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:47,993 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-20 05:20:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:20:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:20:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:47,994 INFO L225 Difference]: With dead ends: 62 [2022-07-20 05:20:47,994 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 05:20:47,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:20:47,996 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:47,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 05:20:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-20 05:20:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 05:20:47,999 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-07-20 05:20:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:47,999 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 05:20:47,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 05:20:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:20:48,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:48,000 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] [2022-07-20 05:20:48,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 05:20:48,000 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-07-20 05:20:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:48,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865524603] [2022-07-20 05:20:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865524603] [2022-07-20 05:20:48,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865524603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:48,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:48,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:20:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329822535] [2022-07-20 05:20:48,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:48,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:20:48,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:20:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:20:48,031 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:48,036 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-20 05:20:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:20:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 05:20:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:48,037 INFO L225 Difference]: With dead ends: 59 [2022-07-20 05:20:48,037 INFO L226 Difference]: Without dead ends: 59 [2022-07-20 05:20:48,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:20:48,038 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:48,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-20 05:20:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-20 05:20:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-20 05:20:48,043 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-07-20 05:20:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:48,044 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-20 05:20:48,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-20 05:20:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:20:48,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:48,045 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, 1] [2022-07-20 05:20:48,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 05:20:48,045 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-07-20 05:20:48,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:48,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417788330] [2022-07-20 05:20:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:48,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:48,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417788330] [2022-07-20 05:20:48,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417788330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:48,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:48,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:20:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621781021] [2022-07-20 05:20:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:48,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:20:48,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:20:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:20:48,159 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:48,227 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-07-20 05:20:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:20:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:20:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:48,228 INFO L225 Difference]: With dead ends: 71 [2022-07-20 05:20:48,228 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 05:20:48,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:20:48,229 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:48,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 05:20:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-20 05:20:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-20 05:20:48,231 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-07-20 05:20:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:48,231 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-20 05:20:48,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-20 05:20:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:20:48,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:48,232 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, 1] [2022-07-20 05:20:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 05:20:48,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-07-20 05:20:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:48,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434700735] [2022-07-20 05:20:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:48,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434700735] [2022-07-20 05:20:48,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434700735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:48,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:48,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:20:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520747707] [2022-07-20 05:20:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:20:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:20:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:20:48,340 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:48,412 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-07-20 05:20:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:20:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:20:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:48,413 INFO L225 Difference]: With dead ends: 74 [2022-07-20 05:20:48,413 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 05:20:48,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:20:48,414 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:48,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:20:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 05:20:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-20 05:20:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 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) [2022-07-20 05:20:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-07-20 05:20:48,416 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-07-20 05:20:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:48,416 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-07-20 05:20:48,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-07-20 05:20:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:20:48,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:48,417 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, 1, 1, 1, 1, 1] [2022-07-20 05:20:48,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 05:20:48,417 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-07-20 05:20:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821468149] [2022-07-20 05:20:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:48,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:48,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821468149] [2022-07-20 05:20:48,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821468149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:48,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:48,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:20:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732959248] [2022-07-20 05:20:48,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:20:48,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:20:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:20:48,509 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:48,643 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-07-20 05:20:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:20:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:20:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:48,644 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:20:48,644 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 05:20:48,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:20:48,645 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:48,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 05:20:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-20 05:20:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 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) [2022-07-20 05:20:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-20 05:20:48,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-07-20 05:20:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:48,648 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-20 05:20:48,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-20 05:20:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:20:48,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:48,651 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, 1, 1, 1, 1, 1] [2022-07-20 05:20:48,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 05:20:48,651 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-07-20 05:20:48,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:48,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056457755] [2022-07-20 05:20:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:48,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:48,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056457755] [2022-07-20 05:20:48,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056457755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:48,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:48,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:20:48,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792330104] [2022-07-20 05:20:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:48,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:20:48,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:20:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:20:48,799 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:49,019 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-20 05:20:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:20:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:20:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:49,020 INFO L225 Difference]: With dead ends: 96 [2022-07-20 05:20:49,020 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:20:49,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:20:49,021 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:49,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 197 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:20:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-07-20 05:20:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 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) [2022-07-20 05:20:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-20 05:20:49,023 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-07-20 05:20:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:49,024 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-20 05:20:49,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-20 05:20:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:20:49,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:49,024 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, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:49,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 05:20:49,024 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-07-20 05:20:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044688687] [2022-07-20 05:20:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:49,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:49,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044688687] [2022-07-20 05:20:49,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044688687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:20:49,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:20:49,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:20:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353724586] [2022-07-20 05:20:49,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:20:49,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:20:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:20:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:20:49,099 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:49,227 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-07-20 05:20:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:20:49,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 05:20:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:49,228 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:20:49,228 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:20:49,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:20:49,229 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:49,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 159 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:20:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-07-20 05:20:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-20 05:20:49,231 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2022-07-20 05:20:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:49,231 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-20 05:20:49,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-20 05:20:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 05:20:49,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:49,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 05:20:49,232 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-07-20 05:20:49,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:49,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162575950] [2022-07-20 05:20:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162575950] [2022-07-20 05:20:49,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162575950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148142044] [2022-07-20 05:20:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:49,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:49,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:49,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:20:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:20:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:49,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:49,634 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 [2022-07-20 05:20:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:49,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148142044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:49,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:49,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-20 05:20:49,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479654937] [2022-07-20 05:20:49,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:49,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:20:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:20:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:20:49,651 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:49,825 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-07-20 05:20:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:20:49,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-20 05:20:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:49,828 INFO L225 Difference]: With dead ends: 69 [2022-07-20 05:20:49,828 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 05:20:49,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:20:49,829 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 458 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:49,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 143 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 05:20:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-07-20 05:20:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-20 05:20:49,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2022-07-20 05:20:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:49,830 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-20 05:20:49,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-20 05:20:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:20:49,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:49,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:49,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:50,044 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2022-07-20 05:20:50,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:50,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792712252] [2022-07-20 05:20:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792712252] [2022-07-20 05:20:50,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792712252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388139321] [2022-07-20 05:20:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:50,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:50,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:20:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:20:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:50,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:50,401 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 [2022-07-20 05:20:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:50,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388139321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:50,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:50,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-20 05:20:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387184447] [2022-07-20 05:20:50,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:50,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:20:50,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:20:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:20:50,425 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:50,595 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-07-20 05:20:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:20:50,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 05:20:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:50,596 INFO L225 Difference]: With dead ends: 86 [2022-07-20 05:20:50,596 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 05:20:50,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:20:50,596 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 344 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:50,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 190 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:20:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 05:20:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2022-07-20 05:20:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-07-20 05:20:50,598 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2022-07-20 05:20:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:50,598 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-07-20 05:20:50,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-07-20 05:20:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 05:20:50,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:50,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:50,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:50,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:50,800 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-07-20 05:20:50,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:50,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228655319] [2022-07-20 05:20:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:50,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:50,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228655319] [2022-07-20 05:20:50,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228655319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706434606] [2022-07-20 05:20:50,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:50,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:50,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:50,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:20:51,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 05:20:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:51,056 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:51,057 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 [2022-07-20 05:20:51,169 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 [2022-07-20 05:20:51,454 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:51,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 05:20:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:51,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:52,020 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 [2022-07-20 05:20:52,023 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 [2022-07-20 05:20:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:52,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706434606] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:52,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:52,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-07-20 05:20:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290749241] [2022-07-20 05:20:52,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:20:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:52,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:20:52,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:20:52,316 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:53,026 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-07-20 05:20:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:20:53,026 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 05:20:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:53,027 INFO L225 Difference]: With dead ends: 94 [2022-07-20 05:20:53,027 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:20:53,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=2431, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:20:53,029 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 129 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:53,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 427 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 291 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-07-20 05:20:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:20:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2022-07-20 05:20:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 84 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-07-20 05:20:53,031 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 36 [2022-07-20 05:20:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:53,032 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-07-20 05:20:53,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-07-20 05:20:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:20:53,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:53,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2022-07-20 05:20:53,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:53,235 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,SelfDestructingSolverStorable23 [2022-07-20 05:20:53,235 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2022-07-20 05:20:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:53,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708833885] [2022-07-20 05:20:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:53,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:53,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708833885] [2022-07-20 05:20:53,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708833885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:53,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304195430] [2022-07-20 05:20:53,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:53,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:53,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:53,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:20:53,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:53,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 05:20:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:53,573 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 [2022-07-20 05:20:53,695 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 [2022-07-20 05:20:53,726 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 [2022-07-20 05:20:54,546 INFO L356 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-07-20 05:20:54,547 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 48 treesize of output 20 [2022-07-20 05:20:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:54,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:55,047 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_295 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_295) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select v_ArrVal_295 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (or (not (= .cse0 .cse1)) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) .cse1)) (= .cse0 0))))) is different from false [2022-07-20 05:20:55,055 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:55,056 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 72 treesize of output 50 [2022-07-20 05:20:55,081 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-20 05:20:55,082 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 93 treesize of output 88 [2022-07-20 05:20:55,109 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-20 05:20:55,110 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 60 treesize of output 62 [2022-07-20 05:20:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:55,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304195430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:55,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:55,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 20] total 45 [2022-07-20 05:20:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926672544] [2022-07-20 05:20:55,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 05:20:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 05:20:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1723, Unknown=1, NotChecked=84, Total=1980 [2022-07-20 05:20:55,456 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:56,766 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-07-20 05:20:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 05:20:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 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 46 [2022-07-20 05:20:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:56,768 INFO L225 Difference]: With dead ends: 152 [2022-07-20 05:20:56,768 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 05:20:56,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=518, Invalid=3145, Unknown=1, NotChecked=118, Total=3782 [2022-07-20 05:20:56,770 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 296 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:56,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 356 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 321 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-07-20 05:20:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 05:20:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2022-07-20 05:20:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 1.113821138211382) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2022-07-20 05:20:56,775 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 46 [2022-07-20 05:20:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:56,775 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2022-07-20 05:20:56,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2022-07-20 05:20:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:20:56,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:56,780 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:20:56,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:56,982 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 3 times [2022-07-20 05:20:56,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:56,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486211478] [2022-07-20 05:20:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:57,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486211478] [2022-07-20 05:20:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486211478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694620392] [2022-07-20 05:20:57,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:57,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:57,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:57,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:20:57,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:20:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:20:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:57,696 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 [2022-07-20 05:20:57,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:20:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:57,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:57,971 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 [2022-07-20 05:20:57,973 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 [2022-07-20 05:20:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694620392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:58,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:58,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-07-20 05:20:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819385194] [2022-07-20 05:20:58,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 05:20:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 05:20:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-07-20 05:20:58,105 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:59,468 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2022-07-20 05:20:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 05:20:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 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 46 [2022-07-20 05:20:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:59,471 INFO L225 Difference]: With dead ends: 219 [2022-07-20 05:20:59,472 INFO L226 Difference]: Without dead ends: 194 [2022-07-20 05:20:59,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=420, Invalid=2442, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 05:20:59,473 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 305 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:59,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 827 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 693 Invalid, 0 Unknown, 178 Unchecked, 0.4s Time] [2022-07-20 05:20:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-20 05:20:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2022-07-20 05:20:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 145 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2022-07-20 05:20:59,477 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 46 [2022-07-20 05:20:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:59,477 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2022-07-20 05:20:59,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2022-07-20 05:20:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 05:20:59,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:59,478 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:20:59,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:59,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:59,688 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 4 times [2022-07-20 05:20:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157710469] [2022-07-20 05:20:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:59,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:59,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157710469] [2022-07-20 05:20:59,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157710469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050911670] [2022-07-20 05:20:59,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:59,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:59,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:59,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:20:59,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:20:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:59,919 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:59,920 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 [2022-07-20 05:21:00,086 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 [2022-07-20 05:21:00,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:00,321 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 19 [2022-07-20 05:21:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:00,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:00,883 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 [2022-07-20 05:21:00,886 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 [2022-07-20 05:21:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050911670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:01,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:01,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2022-07-20 05:21:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655705443] [2022-07-20 05:21:01,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:01,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:21:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:21:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 05:21:01,378 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 42 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:02,618 INFO L93 Difference]: Finished difference Result 269 states and 290 transitions. [2022-07-20 05:21:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:21:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 42 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-20 05:21:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:02,619 INFO L225 Difference]: With dead ends: 269 [2022-07-20 05:21:02,619 INFO L226 Difference]: Without dead ends: 269 [2022-07-20 05:21:02,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=752, Invalid=3280, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 05:21:02,621 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 787 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:02,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 766 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1013 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-07-20 05:21:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-20 05:21:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 170. [2022-07-20 05:21:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.1071428571428572) internal successors, (186), 169 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2022-07-20 05:21:02,625 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 50 [2022-07-20 05:21:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:02,625 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2022-07-20 05:21:02,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 42 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2022-07-20 05:21:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 05:21:02,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:02,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-20 05:21:02,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:02,843 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,SelfDestructingSolverStorable26 [2022-07-20 05:21:02,844 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2022-07-20 05:21:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127115781] [2022-07-20 05:21:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:02,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127115781] [2022-07-20 05:21:02,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127115781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109605389] [2022-07-20 05:21:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:21:02,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:02,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:02,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:21:03,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:21:03,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 05:21:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:03,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:03,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 05:21:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:03,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109605389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:03,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:03,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-07-20 05:21:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724048500] [2022-07-20 05:21:03,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:21:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:21:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:21:03,346 INFO L87 Difference]: Start difference. First operand 170 states and 186 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:03,576 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2022-07-20 05:21:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:21:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 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 50 [2022-07-20 05:21:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:03,577 INFO L225 Difference]: With dead ends: 213 [2022-07-20 05:21:03,577 INFO L226 Difference]: Without dead ends: 213 [2022-07-20 05:21:03,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:21:03,578 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 388 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:03,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 320 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-20 05:21:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2022-07-20 05:21:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 1.1117021276595744) internal successors, (209), 189 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2022-07-20 05:21:03,582 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 50 [2022-07-20 05:21:03,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:03,582 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2022-07-20 05:21:03,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2022-07-20 05:21:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:21:03,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:03,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-07-20 05:21:03,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:03,795 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,SelfDestructingSolverStorable27 [2022-07-20 05:21:03,795 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1672384838, now seen corresponding path program 1 times [2022-07-20 05:21:03,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168511489] [2022-07-20 05:21:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:03,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168511489] [2022-07-20 05:21:03,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168511489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983633415] [2022-07-20 05:21:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:03,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:03,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:03,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:21:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:21:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:04,125 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 [2022-07-20 05:21:04,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:21:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:04,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:04,585 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 [2022-07-20 05:21:04,588 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 [2022-07-20 05:21:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983633415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:04,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:04,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2022-07-20 05:21:04,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621661039] [2022-07-20 05:21:04,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:04,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 05:21:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 05:21:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:21:04,770 INFO L87 Difference]: Start difference. First operand 190 states and 209 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:05,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:05,078 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2022-07-20 05:21:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:21:05,079 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 05:21:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:05,079 INFO L225 Difference]: With dead ends: 233 [2022-07-20 05:21:05,079 INFO L226 Difference]: Without dead ends: 227 [2022-07-20 05:21:05,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:21:05,080 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 216 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:05,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 405 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-20 05:21:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-20 05:21:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-07-20 05:21:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.0982142857142858) internal successors, (246), 225 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 246 transitions. [2022-07-20 05:21:05,084 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 246 transitions. Word has length 53 [2022-07-20 05:21:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:05,085 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 246 transitions. [2022-07-20 05:21:05,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 246 transitions. [2022-07-20 05:21:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 05:21:05,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:05,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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] [2022-07-20 05:21:05,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:05,295 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,SelfDestructingSolverStorable28 [2022-07-20 05:21:05,295 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1104896393, now seen corresponding path program 2 times [2022-07-20 05:21:05,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:05,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133507177] [2022-07-20 05:21:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133507177] [2022-07-20 05:21:05,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133507177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134050985] [2022-07-20 05:21:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:05,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:05,412 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:05,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:21:05,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:05,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 05:21:05,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:05,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:05,793 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 [2022-07-20 05:21:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134050985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:05,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:05,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-07-20 05:21:05,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417893690] [2022-07-20 05:21:05,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:05,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 05:21:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 05:21:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:21:05,821 INFO L87 Difference]: Start difference. First operand 226 states and 246 transitions. Second operand has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:06,208 INFO L93 Difference]: Finished difference Result 294 states and 317 transitions. [2022-07-20 05:21:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:21:06,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-20 05:21:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:06,210 INFO L225 Difference]: With dead ends: 294 [2022-07-20 05:21:06,210 INFO L226 Difference]: Without dead ends: 294 [2022-07-20 05:21:06,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:21:06,211 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 287 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:06,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 346 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:21:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-20 05:21:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 238. [2022-07-20 05:21:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 236 states have (on average 1.1016949152542372) internal successors, (260), 237 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 260 transitions. [2022-07-20 05:21:06,216 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 260 transitions. Word has length 57 [2022-07-20 05:21:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:06,217 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 260 transitions. [2022-07-20 05:21:06,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.636363636363637) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 260 transitions. [2022-07-20 05:21:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 05:21:06,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:06,218 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:06,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:06,443 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1550124260, now seen corresponding path program 5 times [2022-07-20 05:21:06,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:06,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865664718] [2022-07-20 05:21:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:06,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:06,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865664718] [2022-07-20 05:21:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865664718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559667803] [2022-07-20 05:21:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:21:06,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:06,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:06,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:21:06,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 05:21:06,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:21:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:06,688 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:06,689 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 [2022-07-20 05:21:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:06,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:07,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559667803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:07,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:07,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2022-07-20 05:21:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789501082] [2022-07-20 05:21:07,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:07,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 05:21:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 05:21:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:21:07,235 INFO L87 Difference]: Start difference. First operand 238 states and 260 transitions. Second operand has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:07,745 INFO L93 Difference]: Finished difference Result 539 states and 580 transitions. [2022-07-20 05:21:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:21:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 05:21:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:07,748 INFO L225 Difference]: With dead ends: 539 [2022-07-20 05:21:07,748 INFO L226 Difference]: Without dead ends: 506 [2022-07-20 05:21:07,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=772, Invalid=2198, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 05:21:07,749 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 558 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:07,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 363 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:21:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-20 05:21:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 332. [2022-07-20 05:21:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 330 states have (on average 1.1151515151515152) internal successors, (368), 331 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 368 transitions. [2022-07-20 05:21:07,756 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 368 transitions. Word has length 62 [2022-07-20 05:21:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:07,756 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 368 transitions. [2022-07-20 05:21:07,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 368 transitions. [2022-07-20 05:21:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 05:21:07,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:07,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-20 05:21:07,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 05:21:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:07,972 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2022-07-20 05:21:07,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:07,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488101988] [2022-07-20 05:21:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:07,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488101988] [2022-07-20 05:21:08,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488101988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668979117] [2022-07-20 05:21:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:21:08,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:08,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:08,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:21:08,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:21:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 05:21:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:08,674 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:08,674 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 [2022-07-20 05:21:08,684 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 [2022-07-20 05:21:08,992 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 [2022-07-20 05:21:09,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 05:21:13,050 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 [2022-07-20 05:21:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:13,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:14,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:14,078 INFO L356 Elim1Store]: treesize reduction 46, result has 37.8 percent of original size [2022-07-20 05:21:14,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 301 [2022-07-20 05:21:14,094 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:14,094 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 271 treesize of output 255 [2022-07-20 05:21:14,116 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 319 treesize of output 303 [2022-07-20 05:21:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:14,231 INFO L356 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2022-07-20 05:21:14,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 118 [2022-07-20 05:21:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:15,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668979117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:15,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:15,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 25] total 65 [2022-07-20 05:21:15,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852799462] [2022-07-20 05:21:15,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:15,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 05:21:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 05:21:15,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3842, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:21:15,389 INFO L87 Difference]: Start difference. First operand 332 states and 368 transitions. Second operand has 65 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 65 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:17,924 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2022-07-20 05:21:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 05:21:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 65 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 05:21:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:17,926 INFO L225 Difference]: With dead ends: 520 [2022-07-20 05:21:17,926 INFO L226 Difference]: Without dead ends: 485 [2022-07-20 05:21:17,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=793, Invalid=7948, Unknown=1, NotChecked=0, Total=8742 [2022-07-20 05:21:17,929 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:17,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 733 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 621 Invalid, 0 Unknown, 426 Unchecked, 0.3s Time] [2022-07-20 05:21:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-20 05:21:17,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 482. [2022-07-20 05:21:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 480 states have (on average 1.1104166666666666) internal successors, (533), 481 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 533 transitions. [2022-07-20 05:21:17,936 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 533 transitions. Word has length 63 [2022-07-20 05:21:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:17,936 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 533 transitions. [2022-07-20 05:21:17,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.5846153846153848) internal successors, (168), 65 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 533 transitions. [2022-07-20 05:21:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 05:21:17,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:17,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 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] [2022-07-20 05:21:17,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 05:21:18,144 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 3 times [2022-07-20 05:21:18,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552817133] [2022-07-20 05:21:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:21:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552817133] [2022-07-20 05:21:18,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552817133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239285752] [2022-07-20 05:21:18,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:21:18,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:18,674 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:18,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:21:18,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:21:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 05:21:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:18,879 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 [2022-07-20 05:21:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:19,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:19,248 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 [2022-07-20 05:21:19,249 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 [2022-07-20 05:21:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:19,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239285752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:19,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:19,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 35 [2022-07-20 05:21:19,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000046901] [2022-07-20 05:21:19,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:19,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 05:21:19,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 05:21:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:21:19,393 INFO L87 Difference]: Start difference. First operand 482 states and 533 transitions. Second operand has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:21,226 INFO L93 Difference]: Finished difference Result 747 states and 818 transitions. [2022-07-20 05:21:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 05:21:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 05:21:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:21,228 INFO L225 Difference]: With dead ends: 747 [2022-07-20 05:21:21,228 INFO L226 Difference]: Without dead ends: 735 [2022-07-20 05:21:21,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=491, Invalid=3415, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:21:21,230 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 404 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:21,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 966 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1020 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-07-20 05:21:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-07-20 05:21:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 597. [2022-07-20 05:21:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 595 states have (on average 1.1025210084033614) internal successors, (656), 596 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 656 transitions. [2022-07-20 05:21:21,239 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 656 transitions. Word has length 63 [2022-07-20 05:21:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:21,240 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 656 transitions. [2022-07-20 05:21:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 656 transitions. [2022-07-20 05:21:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 05:21:21,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:21,241 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:21:21,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:21,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:21,466 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 6 times [2022-07-20 05:21:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855139294] [2022-07-20 05:21:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:21,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:21,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:21,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855139294] [2022-07-20 05:21:21,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855139294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:21,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833728219] [2022-07-20 05:21:21,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:21,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:21,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:21,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:21,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:21:21,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 05:21:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:21:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:21,921 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 [2022-07-20 05:21:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:22,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:22,277 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 [2022-07-20 05:21:22,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-20 05:21:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:22,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833728219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:22,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:22,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-07-20 05:21:22,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046330802] [2022-07-20 05:21:22,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:22,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:21:22,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:21:22,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:21:22,425 INFO L87 Difference]: Start difference. First operand 597 states and 656 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:23,230 INFO L93 Difference]: Finished difference Result 959 states and 1041 transitions. [2022-07-20 05:21:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:21:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-20 05:21:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:23,233 INFO L225 Difference]: With dead ends: 959 [2022-07-20 05:21:23,233 INFO L226 Difference]: Without dead ends: 915 [2022-07-20 05:21:23,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=2203, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 05:21:23,234 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 618 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:23,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1416 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1199 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-07-20 05:21:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-07-20 05:21:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 609. [2022-07-20 05:21:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 607 states have (on average 1.1037891268533773) internal successors, (670), 608 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 670 transitions. [2022-07-20 05:21:23,245 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 670 transitions. Word has length 66 [2022-07-20 05:21:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:23,245 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 670 transitions. [2022-07-20 05:21:23,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 670 transitions. [2022-07-20 05:21:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 05:21:23,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:23,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:23,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:23,478 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:23,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1057469728, now seen corresponding path program 4 times [2022-07-20 05:21:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:23,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839673584] [2022-07-20 05:21:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:23,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839673584] [2022-07-20 05:21:23,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839673584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:23,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455796269] [2022-07-20 05:21:23,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:21:23,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:23,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:23,645 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) [2022-07-20 05:21:23,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:21:23,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:21:23,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:23,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:21:23,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:23,793 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:23,793 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 [2022-07-20 05:21:23,975 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 [2022-07-20 05:21:24,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:24,237 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 19 treesize of output 19 [2022-07-20 05:21:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:24,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:24,826 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 [2022-07-20 05:21:24,828 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 26 treesize of output 22 [2022-07-20 05:21:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455796269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:25,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:25,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2022-07-20 05:21:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650083897] [2022-07-20 05:21:25,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:25,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:21:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:21:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 05:21:25,300 INFO L87 Difference]: Start difference. First operand 609 states and 670 transitions. Second operand has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:26,390 INFO L93 Difference]: Finished difference Result 1019 states and 1105 transitions. [2022-07-20 05:21:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:21:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 05:21:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:26,393 INFO L225 Difference]: With dead ends: 1019 [2022-07-20 05:21:26,393 INFO L226 Difference]: Without dead ends: 1018 [2022-07-20 05:21:26,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=3320, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 05:21:26,394 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 444 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:26,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 763 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1036 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-07-20 05:21:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-07-20 05:21:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 757. [2022-07-20 05:21:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 755 states have (on average 1.1019867549668874) internal successors, (832), 756 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 832 transitions. [2022-07-20 05:21:26,408 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 832 transitions. Word has length 67 [2022-07-20 05:21:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:26,409 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 832 transitions. [2022-07-20 05:21:26,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 832 transitions. [2022-07-20 05:21:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 05:21:26,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:26,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:26,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:26,632 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,SelfDestructingSolverStorable34 [2022-07-20 05:21:26,632 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 5 times [2022-07-20 05:21:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:26,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526260103] [2022-07-20 05:21:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526260103] [2022-07-20 05:21:26,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526260103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401065543] [2022-07-20 05:21:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:21:26,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:26,758 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) [2022-07-20 05:21:26,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:21:26,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:21:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:21:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:27,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:27,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 05:21:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401065543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:27,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:27,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-07-20 05:21:27,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459245245] [2022-07-20 05:21:27,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:27,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 05:21:27,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 05:21:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:21:27,361 INFO L87 Difference]: Start difference. First operand 757 states and 832 transitions. Second operand has 27 states, 26 states have (on average 6.653846153846154) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:27,751 INFO L93 Difference]: Finished difference Result 1178 states and 1301 transitions. [2022-07-20 05:21:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:21:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.653846153846154) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 05:21:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:27,754 INFO L225 Difference]: With dead ends: 1178 [2022-07-20 05:21:27,754 INFO L226 Difference]: Without dead ends: 1178 [2022-07-20 05:21:27,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:21:27,755 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 362 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:27,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 557 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:21:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-20 05:21:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 890. [2022-07-20 05:21:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 888 states have (on average 1.1036036036036037) internal successors, (980), 889 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 980 transitions. [2022-07-20 05:21:27,768 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 980 transitions. Word has length 67 [2022-07-20 05:21:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:27,769 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 980 transitions. [2022-07-20 05:21:27,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.653846153846154) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 980 transitions. [2022-07-20 05:21:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 05:21:27,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:27,771 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:21:27,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:27,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:27,991 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 7 times [2022-07-20 05:21:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78070335] [2022-07-20 05:21:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:28,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78070335] [2022-07-20 05:21:28,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78070335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987011862] [2022-07-20 05:21:28,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:21:28,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:28,220 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) [2022-07-20 05:21:28,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:21:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 05:21:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:28,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:28,781 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 [2022-07-20 05:21:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:28,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987011862] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:28,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:28,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-20 05:21:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702348937] [2022-07-20 05:21:28,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:28,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:21:28,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:28,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:21:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:21:28,819 INFO L87 Difference]: Start difference. First operand 890 states and 980 transitions. Second operand has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 36 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) [2022-07-20 05:21:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:29,599 INFO L93 Difference]: Finished difference Result 1609 states and 1764 transitions. [2022-07-20 05:21:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:21:29,599 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 36 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 70 [2022-07-20 05:21:29,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:29,602 INFO L225 Difference]: With dead ends: 1609 [2022-07-20 05:21:29,602 INFO L226 Difference]: Without dead ends: 1609 [2022-07-20 05:21:29,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 05:21:29,603 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 601 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:29,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 960 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:21:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-07-20 05:21:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 875. [2022-07-20 05:21:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 873 states have (on average 1.1088201603665522) internal successors, (968), 874 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 968 transitions. [2022-07-20 05:21:29,618 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 968 transitions. Word has length 70 [2022-07-20 05:21:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:29,618 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 968 transitions. [2022-07-20 05:21:29,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 36 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) [2022-07-20 05:21:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 968 transitions. [2022-07-20 05:21:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:21:29,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:29,620 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:29,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:29,835 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2120159335, now seen corresponding path program 1 times [2022-07-20 05:21:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790551555] [2022-07-20 05:21:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:30,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790551555] [2022-07-20 05:21:30,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790551555] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118611938] [2022-07-20 05:21:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:30,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:30,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:30,006 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) [2022-07-20 05:21:30,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:21:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 05:21:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:30,158 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 [2022-07-20 05:21:30,308 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 [2022-07-20 05:21:30,342 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 [2022-07-20 05:21:30,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:21:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:30,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:30,573 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_766) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:21:30,577 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:30,577 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 [2022-07-20 05:21:30,582 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:30,582 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 [2022-07-20 05:21:30,586 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 [2022-07-20 05:21:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:21:30,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118611938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:30,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:30,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2022-07-20 05:21:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377459822] [2022-07-20 05:21:30,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:30,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 05:21:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 05:21:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=478, Unknown=1, NotChecked=44, Total=600 [2022-07-20 05:21:30,724 INFO L87 Difference]: Start difference. First operand 875 states and 968 transitions. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:30,965 INFO L93 Difference]: Finished difference Result 908 states and 1002 transitions. [2022-07-20 05:21:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:21:30,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 05:21:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:30,967 INFO L225 Difference]: With dead ends: 908 [2022-07-20 05:21:30,968 INFO L226 Difference]: Without dead ends: 804 [2022-07-20 05:21:30,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=850, Unknown=1, NotChecked=60, Total=1056 [2022-07-20 05:21:30,968 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:30,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 400 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-20 05:21:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-07-20 05:21:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 757. [2022-07-20 05:21:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 755 states have (on average 1.1152317880794702) internal successors, (842), 756 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 842 transitions. [2022-07-20 05:21:30,978 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 842 transitions. Word has length 73 [2022-07-20 05:21:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:30,978 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 842 transitions. [2022-07-20 05:21:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 842 transitions. [2022-07-20 05:21:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:21:30,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:30,980 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:31,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:31,195 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1844856972, now seen corresponding path program 5 times [2022-07-20 05:21:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:31,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035745484] [2022-07-20 05:21:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:31,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035745484] [2022-07-20 05:21:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035745484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381023530] [2022-07-20 05:21:31,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:21:31,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:31,392 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) [2022-07-20 05:21:31,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:21:31,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:21:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:31,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:21:31,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:31,508 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:31,508 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 [2022-07-20 05:21:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:31,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:32,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381023530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:32,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:32,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-20 05:21:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95441864] [2022-07-20 05:21:32,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:32,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 05:21:32,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 05:21:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:21:32,093 INFO L87 Difference]: Start difference. First operand 757 states and 842 transitions. Second operand has 30 states, 29 states have (on average 5.448275862068965) internal successors, (158), 30 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:32,500 INFO L93 Difference]: Finished difference Result 1046 states and 1143 transitions. [2022-07-20 05:21:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:21:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.448275862068965) internal successors, (158), 30 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 05:21:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:32,506 INFO L225 Difference]: With dead ends: 1046 [2022-07-20 05:21:32,506 INFO L226 Difference]: Without dead ends: 1046 [2022-07-20 05:21:32,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:21:32,509 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 300 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:32,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 460 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:21:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-07-20 05:21:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 878. [2022-07-20 05:21:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 876 states have (on average 1.1130136986301369) internal successors, (975), 877 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 975 transitions. [2022-07-20 05:21:32,522 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 975 transitions. Word has length 73 [2022-07-20 05:21:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:32,523 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 975 transitions. [2022-07-20 05:21:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.448275862068965) internal successors, (158), 30 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 975 transitions. [2022-07-20 05:21:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:21:32,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:32,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:32,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:32,739 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,SelfDestructingSolverStorable38 [2022-07-20 05:21:32,739 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash -429292212, now seen corresponding path program 6 times [2022-07-20 05:21:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342182399] [2022-07-20 05:21:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342182399] [2022-07-20 05:21:33,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342182399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674302963] [2022-07-20 05:21:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:33,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:33,092 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) [2022-07-20 05:21:33,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:21:33,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 05:21:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 05:21:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:33,292 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 [2022-07-20 05:21:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 05:21:33,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:33,663 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 [2022-07-20 05:21:33,665 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 [2022-07-20 05:21:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 05:21:33,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674302963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:33,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:33,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 33 [2022-07-20 05:21:33,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74016470] [2022-07-20 05:21:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:33,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 05:21:33,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 05:21:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:21:33,766 INFO L87 Difference]: Start difference. First operand 878 states and 975 transitions. Second operand has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:34,871 INFO L93 Difference]: Finished difference Result 915 states and 997 transitions. [2022-07-20 05:21:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:21:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 05:21:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:34,873 INFO L225 Difference]: With dead ends: 915 [2022-07-20 05:21:34,873 INFO L226 Difference]: Without dead ends: 906 [2022-07-20 05:21:34,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 05:21:34,874 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 432 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:34,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 817 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 901 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-07-20 05:21:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-07-20 05:21:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 781. [2022-07-20 05:21:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 779 states have (on average 1.1065468549422337) internal successors, (862), 780 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 862 transitions. [2022-07-20 05:21:34,885 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 862 transitions. Word has length 73 [2022-07-20 05:21:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:34,886 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 862 transitions. [2022-07-20 05:21:34,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 862 transitions. [2022-07-20 05:21:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 05:21:34,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:34,887 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:21:34,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:35,111 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,SelfDestructingSolverStorable39 [2022-07-20 05:21:35,112 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 8 times [2022-07-20 05:21:35,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:35,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198236554] [2022-07-20 05:21:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198236554] [2022-07-20 05:21:35,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198236554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850219389] [2022-07-20 05:21:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:35,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:35,365 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) [2022-07-20 05:21:35,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:21:35,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:35,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:21:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:35,475 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:35,476 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 [2022-07-20 05:21:35,689 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 [2022-07-20 05:21:36,325 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:36,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 05:21:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:36,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:37,185 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 [2022-07-20 05:21:37,188 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 26 treesize of output 22 [2022-07-20 05:21:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 45 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:37,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850219389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:37,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:37,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-07-20 05:21:37,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891503937] [2022-07-20 05:21:37,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:37,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-20 05:21:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-20 05:21:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3390, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 05:21:37,857 INFO L87 Difference]: Start difference. First operand 781 states and 862 transitions. Second operand has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 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) [2022-07-20 05:21:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:39,971 INFO L93 Difference]: Finished difference Result 1324 states and 1441 transitions. [2022-07-20 05:21:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:21:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 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 76 [2022-07-20 05:21:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:39,975 INFO L225 Difference]: With dead ends: 1324 [2022-07-20 05:21:39,975 INFO L226 Difference]: Without dead ends: 1278 [2022-07-20 05:21:39,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=699, Invalid=7311, Unknown=0, NotChecked=0, Total=8010 [2022-07-20 05:21:39,975 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 867 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:39,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1975 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2236 Invalid, 0 Unknown, 435 Unchecked, 0.9s Time] [2022-07-20 05:21:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-07-20 05:21:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 889. [2022-07-20 05:21:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 887 states have (on average 1.1071025930101466) internal successors, (982), 888 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 982 transitions. [2022-07-20 05:21:39,989 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 982 transitions. Word has length 76 [2022-07-20 05:21:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:39,989 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 982 transitions. [2022-07-20 05:21:39,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 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) [2022-07-20 05:21:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 982 transitions. [2022-07-20 05:21:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 05:21:39,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:39,991 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:40,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:40,216 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 7 times [2022-07-20 05:21:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:40,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128893478] [2022-07-20 05:21:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:40,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:21:40,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128893478] [2022-07-20 05:21:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128893478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082690061] [2022-07-20 05:21:40,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:21:40,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:40,796 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) [2022-07-20 05:21:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:21:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 05:21:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:41,028 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 [2022-07-20 05:21:41,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:21:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 86 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:41,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:41,417 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 [2022-07-20 05:21:41,423 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 [2022-07-20 05:21:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 86 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:41,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082690061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:41,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:41,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 36 [2022-07-20 05:21:41,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188541235] [2022-07-20 05:21:41,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:41,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:21:41,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:21:41,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:21:41,557 INFO L87 Difference]: Start difference. First operand 889 states and 982 transitions. Second operand has 36 states, 36 states have (on average 4.138888888888889) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:43,841 INFO L93 Difference]: Finished difference Result 1235 states and 1340 transitions. [2022-07-20 05:21:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 05:21:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.138888888888889) internal successors, (149), 36 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 79 [2022-07-20 05:21:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:43,844 INFO L225 Difference]: With dead ends: 1235 [2022-07-20 05:21:43,844 INFO L226 Difference]: Without dead ends: 1153 [2022-07-20 05:21:43,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=605, Invalid=4945, Unknown=0, NotChecked=0, Total=5550 [2022-07-20 05:21:43,845 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 565 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:43,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1589 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1580 Invalid, 0 Unknown, 173 Unchecked, 0.7s Time] [2022-07-20 05:21:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-07-20 05:21:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 993. [2022-07-20 05:21:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 991 states have (on average 1.1039354187689203) internal successors, (1094), 992 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1094 transitions. [2022-07-20 05:21:43,863 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1094 transitions. Word has length 79 [2022-07-20 05:21:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:43,863 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1094 transitions. [2022-07-20 05:21:43,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.138888888888889) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1094 transitions. [2022-07-20 05:21:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 05:21:43,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:43,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-07-20 05:21:43,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:44,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:44,087 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 6 times [2022-07-20 05:21:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:44,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43456805] [2022-07-20 05:21:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:44,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43456805] [2022-07-20 05:21:44,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43456805] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172931997] [2022-07-20 05:21:44,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:44,436 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) [2022-07-20 05:21:44,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:21:44,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:21:44,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:44,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-20 05:21:44,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:44,583 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 [2022-07-20 05:21:44,824 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 [2022-07-20 05:21:44,864 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 [2022-07-20 05:21:46,217 INFO L356 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2022-07-20 05:21:46,218 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 24 [2022-07-20 05:21:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:46,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:47,108 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_971 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_971) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_971 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (not (= .cse1 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse1 0)))) is different from false [2022-07-20 05:21:47,118 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:47,118 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 [2022-07-20 05:21:47,134 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-20 05:21:47,134 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 [2022-07-20 05:21:47,154 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-07-20 05:21:47,155 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 [2022-07-20 05:21:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:47,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172931997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:47,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 26] total 68 [2022-07-20 05:21:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009087389] [2022-07-20 05:21:47,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 05:21:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 05:21:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4177, Unknown=1, NotChecked=130, Total=4556 [2022-07-20 05:21:47,585 INFO L87 Difference]: Start difference. First operand 993 states and 1094 transitions. Second operand has 68 states, 68 states have (on average 3.2794117647058822) internal successors, (223), 68 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:54,910 INFO L93 Difference]: Finished difference Result 1866 states and 2032 transitions. [2022-07-20 05:21:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-20 05:21:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.2794117647058822) internal successors, (223), 68 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-20 05:21:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:54,913 INFO L225 Difference]: With dead ends: 1866 [2022-07-20 05:21:54,914 INFO L226 Difference]: Without dead ends: 1794 [2022-07-20 05:21:54,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1005, Invalid=13760, Unknown=1, NotChecked=240, Total=15006 [2022-07-20 05:21:54,915 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 480 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2164 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:54,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 2034 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1495 Invalid, 0 Unknown, 2164 Unchecked, 0.6s Time] [2022-07-20 05:21:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-07-20 05:21:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1618. [2022-07-20 05:21:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1616 states have (on average 1.1045792079207921) internal successors, (1785), 1617 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 1785 transitions. [2022-07-20 05:21:54,934 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 1785 transitions. Word has length 80 [2022-07-20 05:21:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:54,935 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 1785 transitions. [2022-07-20 05:21:54,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.2794117647058822) internal successors, (223), 68 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 1785 transitions. [2022-07-20 05:21:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 05:21:54,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:54,937 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:54,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-20 05:21:55,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:55,151 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:55,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1938211421, now seen corresponding path program 8 times [2022-07-20 05:21:55,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:55,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4104223] [2022-07-20 05:21:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 6 proven. 114 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:55,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4104223] [2022-07-20 05:21:55,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4104223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:55,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353538399] [2022-07-20 05:21:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:55,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:55,340 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) [2022-07-20 05:21:55,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:21:55,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:21:55,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:55,479 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:55,479 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 [2022-07-20 05:21:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:55,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:21:56,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353538399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:56,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:56,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-07-20 05:21:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490189651] [2022-07-20 05:21:56,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:21:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:56,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:21:56,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:21:56,258 INFO L87 Difference]: Start difference. First operand 1618 states and 1785 transitions. Second operand has 40 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 40 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:56,896 INFO L93 Difference]: Finished difference Result 1943 states and 2109 transitions. [2022-07-20 05:21:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 05:21:56,897 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 40 states have internal predecessors, (207), 0 states have call successors, (0), 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 83 [2022-07-20 05:21:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:56,900 INFO L225 Difference]: With dead ends: 1943 [2022-07-20 05:21:56,900 INFO L226 Difference]: Without dead ends: 1870 [2022-07-20 05:21:56,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:21:56,901 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 667 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:56,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 690 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:21:56,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-07-20 05:21:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1383. [2022-07-20 05:21:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1381 states have (on average 1.1049963794351918) internal successors, (1526), 1382 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1526 transitions. [2022-07-20 05:21:56,922 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1526 transitions. Word has length 83 [2022-07-20 05:21:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:56,922 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 1526 transitions. [2022-07-20 05:21:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 40 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1526 transitions. [2022-07-20 05:21:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 05:21:56,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:56,925 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-07-20 05:21:56,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:57,143 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,SelfDestructingSolverStorable43 [2022-07-20 05:21:57,143 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1003116751, now seen corresponding path program 7 times [2022-07-20 05:21:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636838044] [2022-07-20 05:21:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:57,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:57,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636838044] [2022-07-20 05:21:57,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636838044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:57,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76473412] [2022-07-20 05:21:57,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:21:57,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:57,289 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) [2022-07-20 05:21:57,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:21:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:57,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 05:21:57,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:57,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:57,858 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 [2022-07-20 05:21:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:57,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76473412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:57,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:57,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2022-07-20 05:21:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549172662] [2022-07-20 05:21:57,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 05:21:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 05:21:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:21:57,892 INFO L87 Difference]: Start difference. First operand 1383 states and 1526 transitions. Second operand has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 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) [2022-07-20 05:21:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:58,354 INFO L93 Difference]: Finished difference Result 1807 states and 1985 transitions. [2022-07-20 05:21:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:21:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 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) Word has length 84 [2022-07-20 05:21:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:58,358 INFO L225 Difference]: With dead ends: 1807 [2022-07-20 05:21:58,358 INFO L226 Difference]: Without dead ends: 1807 [2022-07-20 05:21:58,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:21:58,359 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 432 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:58,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 862 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:21:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-07-20 05:21:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1515. [2022-07-20 05:21:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1513 states have (on average 1.1044282881692002) internal successors, (1671), 1514 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1671 transitions. [2022-07-20 05:21:58,379 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1671 transitions. Word has length 84 [2022-07-20 05:21:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:58,380 INFO L495 AbstractCegarLoop]: Abstraction has 1515 states and 1671 transitions. [2022-07-20 05:21:58,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.666666666666667) internal successors, (180), 28 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) [2022-07-20 05:21:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1671 transitions. [2022-07-20 05:21:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-20 05:21:58,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:58,382 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:21:58,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:58,591 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,SelfDestructingSolverStorable44 [2022-07-20 05:21:58,591 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 9 times [2022-07-20 05:21:58,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:58,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439986751] [2022-07-20 05:21:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:58,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439986751] [2022-07-20 05:21:58,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439986751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:58,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339721118] [2022-07-20 05:21:58,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:21:58,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:58,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:58,900 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) [2022-07-20 05:21:58,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:21:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 05:21:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:21:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:59,344 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 [2022-07-20 05:21:59,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:21:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:59,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:59,682 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 [2022-07-20 05:21:59,687 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 [2022-07-20 05:21:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:21:59,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339721118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:59,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:59,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2022-07-20 05:21:59,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661593921] [2022-07-20 05:21:59,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:21:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:21:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:21:59,818 INFO L87 Difference]: Start difference. First operand 1515 states and 1671 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) [2022-07-20 05:22:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:01,114 INFO L93 Difference]: Finished difference Result 2651 states and 2903 transitions. [2022-07-20 05:22:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:22:01,115 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 86 [2022-07-20 05:22:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:01,120 INFO L225 Difference]: With dead ends: 2651 [2022-07-20 05:22:01,120 INFO L226 Difference]: Without dead ends: 2584 [2022-07-20 05:22:01,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=3016, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 05:22:01,120 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 719 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:01,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 2766 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2253 Invalid, 0 Unknown, 73 Unchecked, 0.8s Time] [2022-07-20 05:22:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-07-20 05:22:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1996. [2022-07-20 05:22:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1994 states have (on average 1.1078234704112337) internal successors, (2209), 1995 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2209 transitions. [2022-07-20 05:22:01,145 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2209 transitions. Word has length 86 [2022-07-20 05:22:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:01,145 INFO L495 AbstractCegarLoop]: Abstraction has 1996 states and 2209 transitions. [2022-07-20 05:22:01,146 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) [2022-07-20 05:22:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2209 transitions. [2022-07-20 05:22:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:22:01,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:01,149 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 05:22:01,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:01,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 05:22:01,367 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:01,368 INFO L85 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 10 times [2022-07-20 05:22:01,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:01,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996758931] [2022-07-20 05:22:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:01,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:01,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:01,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996758931] [2022-07-20 05:22:01,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996758931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672182101] [2022-07-20 05:22:01,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:22:01,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:01,680 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) [2022-07-20 05:22:01,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:22:01,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:22:01,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 05:22:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:01,856 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:01,857 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 [2022-07-20 05:22:02,042 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 [2022-07-20 05:22:02,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:02,487 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 19 [2022-07-20 05:22:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 72 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:02,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:03,347 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 [2022-07-20 05:22:03,351 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 [2022-07-20 05:22:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:04,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672182101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:04,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:04,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 59 [2022-07-20 05:22:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425781395] [2022-07-20 05:22:04,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-20 05:22:04,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-20 05:22:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 05:22:04,248 INFO L87 Difference]: Start difference. First operand 1996 states and 2209 transitions. Second operand has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 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) [2022-07-20 05:22:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:07,608 INFO L93 Difference]: Finished difference Result 3208 states and 3492 transitions. [2022-07-20 05:22:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-20 05:22:07,609 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 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) Word has length 90 [2022-07-20 05:22:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:07,615 INFO L225 Difference]: With dead ends: 3208 [2022-07-20 05:22:07,615 INFO L226 Difference]: Without dead ends: 3096 [2022-07-20 05:22:07,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1807, Invalid=7505, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 05:22:07,616 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1472 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 3885 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:07,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 2453 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3885 Invalid, 0 Unknown, 126 Unchecked, 1.6s Time] [2022-07-20 05:22:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2022-07-20 05:22:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2366. [2022-07-20 05:22:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2364 states have (on average 1.1150592216582065) internal successors, (2636), 2365 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 2636 transitions. [2022-07-20 05:22:07,639 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 2636 transitions. Word has length 90 [2022-07-20 05:22:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:07,640 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 2636 transitions. [2022-07-20 05:22:07,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 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) [2022-07-20 05:22:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 2636 transitions. [2022-07-20 05:22:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:22:07,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:07,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:07,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-20 05:22:07,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:07,842 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash 318466939, now seen corresponding path program 2 times [2022-07-20 05:22:07,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775099851] [2022-07-20 05:22:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:22:08,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:08,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775099851] [2022-07-20 05:22:08,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775099851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:08,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500853160] [2022-07-20 05:22:08,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:22:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:08,312 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) [2022-07-20 05:22:08,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:22:08,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:22:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:22:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:08,456 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 [2022-07-20 05:22:08,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:22:08,733 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 [2022-07-20 05:22:08,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:22:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:08,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:08,999 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1198 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1198) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:22:09,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:09,003 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 [2022-07-20 05:22:09,007 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:09,008 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 [2022-07-20 05:22:09,010 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 [2022-07-20 05:22:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:09,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500853160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:09,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:09,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 34 [2022-07-20 05:22:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937188765] [2022-07-20 05:22:09,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:09,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:22:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:22:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=958, Unknown=1, NotChecked=62, Total=1122 [2022-07-20 05:22:09,186 INFO L87 Difference]: Start difference. First operand 2366 states and 2636 transitions. Second operand has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:10,195 INFO L93 Difference]: Finished difference Result 2252 states and 2495 transitions. [2022-07-20 05:22:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:22:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-20 05:22:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:10,199 INFO L225 Difference]: With dead ends: 2252 [2022-07-20 05:22:10,199 INFO L226 Difference]: Without dead ends: 1838 [2022-07-20 05:22:10,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=317, Invalid=2656, Unknown=1, NotChecked=106, Total=3080 [2022-07-20 05:22:10,200 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 246 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:10,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 882 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 961 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2022-07-20 05:22:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-07-20 05:22:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1667. [2022-07-20 05:22:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.1177177177177178) internal successors, (1861), 1666 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 1861 transitions. [2022-07-20 05:22:10,214 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 1861 transitions. Word has length 90 [2022-07-20 05:22:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:10,214 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 1861 transitions. [2022-07-20 05:22:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 1861 transitions. [2022-07-20 05:22:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 05:22:10,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:10,216 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:10,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-20 05:22:10,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-20 05:22:10,424 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash 422434722, now seen corresponding path program 9 times [2022-07-20 05:22:10,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:10,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457773527] [2022-07-20 05:22:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:22:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457773527] [2022-07-20 05:22:10,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457773527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678392838] [2022-07-20 05:22:10,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:22:10,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:10,688 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) [2022-07-20 05:22:10,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:22:10,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 05:22:10,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:10,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:22:10,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:11,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-20 05:22:11,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:22:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:22:11,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:11,366 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 [2022-07-20 05:22:11,368 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 [2022-07-20 05:22:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:22:11,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678392838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:11,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:11,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 37 [2022-07-20 05:22:11,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683067438] [2022-07-20 05:22:11,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:11,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:22:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:22:11,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:22:11,508 INFO L87 Difference]: Start difference. First operand 1667 states and 1861 transitions. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:12,397 INFO L93 Difference]: Finished difference Result 1825 states and 1998 transitions. [2022-07-20 05:22:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:22:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 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 93 [2022-07-20 05:22:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:12,402 INFO L225 Difference]: With dead ends: 1825 [2022-07-20 05:22:12,402 INFO L226 Difference]: Without dead ends: 1619 [2022-07-20 05:22:12,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 05:22:12,403 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 603 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:12,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1800 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1388 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-07-20 05:22:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-07-20 05:22:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1514. [2022-07-20 05:22:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1512 states have (on average 1.1104497354497354) internal successors, (1679), 1513 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1679 transitions. [2022-07-20 05:22:12,416 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1679 transitions. Word has length 93 [2022-07-20 05:22:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:12,417 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 1679 transitions. [2022-07-20 05:22:12,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1679 transitions. [2022-07-20 05:22:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 05:22:12,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:12,419 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2022-07-20 05:22:12,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-20 05:22:12,632 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,SelfDestructingSolverStorable48 [2022-07-20 05:22:12,633 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1725290594, now seen corresponding path program 8 times [2022-07-20 05:22:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:12,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431151364] [2022-07-20 05:22:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:13,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:13,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431151364] [2022-07-20 05:22:13,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431151364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:13,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083194161] [2022-07-20 05:22:13,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:22:13,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:13,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:13,036 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) [2022-07-20 05:22:13,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:22:13,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:22:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-20 05:22:13,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:13,171 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 [2022-07-20 05:22:13,387 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 [2022-07-20 05:22:13,424 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 [2022-07-20 05:22:13,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:22:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:13,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:13,830 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1289) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:22:13,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:13,834 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 23 treesize of output 24 [2022-07-20 05:22:13,840 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:13,840 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 [2022-07-20 05:22:13,843 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 [2022-07-20 05:22:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 49 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083194161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:14,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:14,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 44 [2022-07-20 05:22:14,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283247145] [2022-07-20 05:22:14,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:14,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:22:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:22:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1691, Unknown=1, NotChecked=82, Total=1892 [2022-07-20 05:22:14,063 INFO L87 Difference]: Start difference. First operand 1514 states and 1679 transitions. Second operand has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:15,269 INFO L93 Difference]: Finished difference Result 2976 states and 3280 transitions. [2022-07-20 05:22:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:22:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 states have internal predecessors, (209), 0 states have call successors, (0), 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 [2022-07-20 05:22:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:15,274 INFO L225 Difference]: With dead ends: 2976 [2022-07-20 05:22:15,274 INFO L226 Difference]: Without dead ends: 1929 [2022-07-20 05:22:15,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=3848, Unknown=1, NotChecked=126, Total=4290 [2022-07-20 05:22:15,275 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 209 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:15,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1581 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1739 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2022-07-20 05:22:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-07-20 05:22:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1613. [2022-07-20 05:22:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.1111111111111112) internal successors, (1790), 1612 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 1790 transitions. [2022-07-20 05:22:15,291 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 1790 transitions. Word has length 97 [2022-07-20 05:22:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:15,292 INFO L495 AbstractCegarLoop]: Abstraction has 1613 states and 1790 transitions. [2022-07-20 05:22:15,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.75) internal successors, (209), 44 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 1790 transitions. [2022-07-20 05:22:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 05:22:15,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:15,294 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2022-07-20 05:22:15,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:15,499 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,SelfDestructingSolverStorable49 [2022-07-20 05:22:15,499 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash -824280031, now seen corresponding path program 9 times [2022-07-20 05:22:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682248121] [2022-07-20 05:22:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682248121] [2022-07-20 05:22:15,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682248121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745165675] [2022-07-20 05:22:15,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:22:15,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:15,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:15,673 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) [2022-07-20 05:22:15,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:22:15,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 05:22:15,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 05:22:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:16,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:16,487 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 [2022-07-20 05:22:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:16,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745165675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:16,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:16,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-07-20 05:22:16,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911458885] [2022-07-20 05:22:16,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:16,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:22:16,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:22:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:22:16,685 INFO L87 Difference]: Start difference. First operand 1613 states and 1790 transitions. Second operand has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:17,430 INFO L93 Difference]: Finished difference Result 2439 states and 2689 transitions. [2022-07-20 05:22:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:22:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-20 05:22:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:17,434 INFO L225 Difference]: With dead ends: 2439 [2022-07-20 05:22:17,434 INFO L226 Difference]: Without dead ends: 2439 [2022-07-20 05:22:17,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=566, Invalid=2190, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:22:17,435 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 835 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:17,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 970 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:22:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-07-20 05:22:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1843. [2022-07-20 05:22:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1841 states have (on average 1.1108093427485062) internal successors, (2045), 1842 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2045 transitions. [2022-07-20 05:22:17,458 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2045 transitions. Word has length 101 [2022-07-20 05:22:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:17,459 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2045 transitions. [2022-07-20 05:22:17,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2045 transitions. [2022-07-20 05:22:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-20 05:22:17,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:17,462 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:17,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:17,679 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1695966432, now seen corresponding path program 11 times [2022-07-20 05:22:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720290166] [2022-07-20 05:22:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 182 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:17,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720290166] [2022-07-20 05:22:17,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720290166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:17,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959088444] [2022-07-20 05:22:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:22:17,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:17,960 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) [2022-07-20 05:22:17,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:22:18,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 05:22:18,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 05:22:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:18,132 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:18,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-20 05:22:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:18,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:19,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959088444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:19,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:19,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 54 [2022-07-20 05:22:19,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144505385] [2022-07-20 05:22:19,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:19,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-20 05:22:19,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-20 05:22:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2419, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 05:22:19,153 INFO L87 Difference]: Start difference. First operand 1843 states and 2045 transitions. Second operand has 54 states, 54 states have (on average 4.5) internal successors, (243), 54 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:21,257 INFO L93 Difference]: Finished difference Result 3229 states and 3492 transitions. [2022-07-20 05:22:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 05:22:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.5) internal successors, (243), 54 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-20 05:22:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:21,261 INFO L225 Difference]: With dead ends: 3229 [2022-07-20 05:22:21,261 INFO L226 Difference]: Without dead ends: 2879 [2022-07-20 05:22:21,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2479, Invalid=8651, Unknown=0, NotChecked=0, Total=11130 [2022-07-20 05:22:21,262 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1273 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:21,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 1258 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:22:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-07-20 05:22:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2197. [2022-07-20 05:22:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2195 states have (on average 1.1129840546697038) internal successors, (2443), 2196 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 2443 transitions. [2022-07-20 05:22:21,285 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 2443 transitions. Word has length 102 [2022-07-20 05:22:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:21,285 INFO L495 AbstractCegarLoop]: Abstraction has 2197 states and 2443 transitions. [2022-07-20 05:22:21,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.5) internal successors, (243), 54 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 2443 transitions. [2022-07-20 05:22:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 05:22:21,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:21,288 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:21,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:21,511 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,SelfDestructingSolverStorable51 [2022-07-20 05:22:21,512 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 12 times [2022-07-20 05:22:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:21,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184449906] [2022-07-20 05:22:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:21,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:21,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:21,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184449906] [2022-07-20 05:22:21,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184449906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:21,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937815516] [2022-07-20 05:22:21,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:22:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:21,868 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) [2022-07-20 05:22:21,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:22:22,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-20 05:22:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 05:22:22,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:22,298 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 [2022-07-20 05:22:22,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:22:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:22,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:22,628 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 [2022-07-20 05:22:22,629 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 [2022-07-20 05:22:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:22,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937815516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:22,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:22,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2022-07-20 05:22:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313920750] [2022-07-20 05:22:22,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:22,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:22:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:22:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:22:22,832 INFO L87 Difference]: Start difference. First operand 2197 states and 2443 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:24,486 INFO L93 Difference]: Finished difference Result 3646 states and 4022 transitions. [2022-07-20 05:22:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:22:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 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 106 [2022-07-20 05:22:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:24,491 INFO L225 Difference]: With dead ends: 3646 [2022-07-20 05:22:24,491 INFO L226 Difference]: Without dead ends: 3556 [2022-07-20 05:22:24,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 186 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=4256, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 05:22:24,492 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 689 mSDsluCounter, 4139 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:24,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 4336 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3050 Invalid, 0 Unknown, 253 Unchecked, 1.0s Time] [2022-07-20 05:22:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-07-20 05:22:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2722. [2022-07-20 05:22:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2720 states have (on average 1.1158088235294117) internal successors, (3035), 2721 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3035 transitions. [2022-07-20 05:22:24,520 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3035 transitions. Word has length 106 [2022-07-20 05:22:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:24,521 INFO L495 AbstractCegarLoop]: Abstraction has 2722 states and 3035 transitions. [2022-07-20 05:22:24,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3035 transitions. [2022-07-20 05:22:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 05:22:24,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:24,524 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:24,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:24,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:24,748 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -23027046, now seen corresponding path program 13 times [2022-07-20 05:22:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266478809] [2022-07-20 05:22:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:25,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:25,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266478809] [2022-07-20 05:22:25,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266478809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:25,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964985308] [2022-07-20 05:22:25,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:22:25,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:25,091 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) [2022-07-20 05:22:25,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:22:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:25,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 05:22:25,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:25,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:26,112 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 [2022-07-20 05:22:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:26,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964985308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:26,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:26,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 50 [2022-07-20 05:22:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378654404] [2022-07-20 05:22:26,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-20 05:22:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-20 05:22:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 05:22:26,166 INFO L87 Difference]: Start difference. First operand 2722 states and 3035 transitions. Second operand has 51 states, 50 states have (on average 4.56) internal successors, (228), 51 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:28,384 INFO L93 Difference]: Finished difference Result 3801 states and 4195 transitions. [2022-07-20 05:22:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 05:22:28,385 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.56) internal successors, (228), 51 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-20 05:22:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:28,389 INFO L225 Difference]: With dead ends: 3801 [2022-07-20 05:22:28,389 INFO L226 Difference]: Without dead ends: 3801 [2022-07-20 05:22:28,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1194, Invalid=5126, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 05:22:28,390 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1172 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:28,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 2323 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 05:22:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2022-07-20 05:22:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3227. [2022-07-20 05:22:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3225 states have (on average 1.1224806201550388) internal successors, (3620), 3226 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 3620 transitions. [2022-07-20 05:22:28,453 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 3620 transitions. Word has length 110 [2022-07-20 05:22:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:28,453 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 3620 transitions. [2022-07-20 05:22:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.56) internal successors, (228), 51 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 3620 transitions. [2022-07-20 05:22:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-20 05:22:28,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:28,457 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2022-07-20 05:22:28,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:28,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-20 05:22:28,671 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1378974092, now seen corresponding path program 10 times [2022-07-20 05:22:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898716155] [2022-07-20 05:22:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898716155] [2022-07-20 05:22:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898716155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240106818] [2022-07-20 05:22:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:22:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:29,124 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:29,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:22:29,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:22:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:29,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-20 05:22:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:29,316 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:29,317 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 [2022-07-20 05:22:29,327 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 [2022-07-20 05:22:29,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:22:29,782 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 [2022-07-20 05:22:31,333 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 [2022-07-20 05:22:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:31,777 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 43 treesize of output 17 [2022-07-20 05:22:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 98 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:31,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:33,055 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:33,056 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 70 treesize of output 48 [2022-07-20 05:22:33,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:33,066 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:33,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 92 [2022-07-20 05:22:33,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:33,078 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:33,078 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 [2022-07-20 05:22:34,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 148 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:34,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240106818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:34,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:34,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 73 [2022-07-20 05:22:34,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640675311] [2022-07-20 05:22:34,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:34,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 05:22:34,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 05:22:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=4884, Unknown=10, NotChecked=0, Total=5256 [2022-07-20 05:22:34,146 INFO L87 Difference]: Start difference. First operand 3227 states and 3620 transitions. Second operand has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:38,109 INFO L93 Difference]: Finished difference Result 4043 states and 4483 transitions. [2022-07-20 05:22:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 05:22:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 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 114 [2022-07-20 05:22:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:38,114 INFO L225 Difference]: With dead ends: 4043 [2022-07-20 05:22:38,114 INFO L226 Difference]: Without dead ends: 3933 [2022-07-20 05:22:38,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4439 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1577, Invalid=19005, Unknown=10, NotChecked=0, Total=20592 [2022-07-20 05:22:38,116 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 224 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:38,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 2139 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 873 Invalid, 0 Unknown, 293 Unchecked, 0.3s Time] [2022-07-20 05:22:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2022-07-20 05:22:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3789. [2022-07-20 05:22:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3787 states have (on average 1.1151307103247954) internal successors, (4223), 3788 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 4223 transitions. [2022-07-20 05:22:38,154 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 4223 transitions. Word has length 114 [2022-07-20 05:22:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:38,155 INFO L495 AbstractCegarLoop]: Abstraction has 3789 states and 4223 transitions. [2022-07-20 05:22:38,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.36986301369863) internal successors, (319), 73 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 4223 transitions. [2022-07-20 05:22:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 05:22:38,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:38,159 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:38,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:38,375 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash 772743854, now seen corresponding path program 14 times [2022-07-20 05:22:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:38,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822614133] [2022-07-20 05:22:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822614133] [2022-07-20 05:22:38,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822614133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010329793] [2022-07-20 05:22:38,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:22:38,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:38,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:38,846 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:38,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:22:39,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:22:39,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 05:22:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:39,048 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:39,049 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 [2022-07-20 05:22:39,450 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 [2022-07-20 05:22:40,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:40,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 05:22:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:40,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:41,928 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 [2022-07-20 05:22:41,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-20 05:22:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 153 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:43,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010329793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:43,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:43,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2022-07-20 05:22:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424955783] [2022-07-20 05:22:43,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-20 05:22:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-20 05:22:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=6662, Unknown=0, NotChecked=0, Total=7140 [2022-07-20 05:22:43,212 INFO L87 Difference]: Start difference. First operand 3789 states and 4223 transitions. Second operand has 85 states, 85 states have (on average 4.0) internal successors, (340), 85 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:47,779 INFO L93 Difference]: Finished difference Result 4593 states and 5083 transitions. [2022-07-20 05:22:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-20 05:22:47,780 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.0) internal successors, (340), 85 states have internal predecessors, (340), 0 states have call successors, (0), 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 116 [2022-07-20 05:22:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:47,797 INFO L225 Difference]: With dead ends: 4593 [2022-07-20 05:22:47,798 INFO L226 Difference]: Without dead ends: 4517 [2022-07-20 05:22:47,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1329, Invalid=15441, Unknown=0, NotChecked=0, Total=16770 [2022-07-20 05:22:47,799 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 1662 mSDsluCounter, 5096 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 5240 SdHoareTripleChecker+Invalid, 6789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:47,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 5240 Invalid, 6789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 5819 Invalid, 0 Unknown, 858 Unchecked, 2.1s Time] [2022-07-20 05:22:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2022-07-20 05:22:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4112. [2022-07-20 05:22:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 4110 states have (on average 1.1163017031630171) internal successors, (4588), 4111 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 4588 transitions. [2022-07-20 05:22:47,843 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 4588 transitions. Word has length 116 [2022-07-20 05:22:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:47,843 INFO L495 AbstractCegarLoop]: Abstraction has 4112 states and 4588 transitions. [2022-07-20 05:22:47,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.0) internal successors, (340), 85 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:47,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 4588 transitions. [2022-07-20 05:22:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-20 05:22:47,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:47,848 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2022-07-20 05:22:47,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-20 05:22:48,066 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash 802577257, now seen corresponding path program 11 times [2022-07-20 05:22:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:48,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137588230] [2022-07-20 05:22:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:48,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137588230] [2022-07-20 05:22:48,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137588230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786968076] [2022-07-20 05:22:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:22:48,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:48,298 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:48,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:22:48,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:22:48,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 05:22:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:48,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:49,169 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 [2022-07-20 05:22:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:49,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786968076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:49,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:49,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-20 05:22:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878529760] [2022-07-20 05:22:49,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:49,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 05:22:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:49,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 05:22:49,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 05:22:49,387 INFO L87 Difference]: Start difference. First operand 4112 states and 4588 transitions. Second operand has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:50,159 INFO L93 Difference]: Finished difference Result 7736 states and 8651 transitions. [2022-07-20 05:22:50,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:22:50,160 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 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 118 [2022-07-20 05:22:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:50,171 INFO L225 Difference]: With dead ends: 7736 [2022-07-20 05:22:50,171 INFO L226 Difference]: Without dead ends: 7736 [2022-07-20 05:22:50,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 05:22:50,172 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1044 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:50,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 1326 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:22:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2022-07-20 05:22:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 4568. [2022-07-20 05:22:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4566 states have (on average 1.1171703898379326) internal successors, (5101), 4567 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 5101 transitions. [2022-07-20 05:22:50,235 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 5101 transitions. Word has length 118 [2022-07-20 05:22:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:50,235 INFO L495 AbstractCegarLoop]: Abstraction has 4568 states and 5101 transitions. [2022-07-20 05:22:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 7.0) internal successors, (280), 41 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 5101 transitions. [2022-07-20 05:22:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 05:22:50,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:50,242 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:50,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-20 05:22:50,468 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1389650563, now seen corresponding path program 3 times [2022-07-20 05:22:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:50,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930463132] [2022-07-20 05:22:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930463132] [2022-07-20 05:22:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930463132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:50,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875396948] [2022-07-20 05:22:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:22:50,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:50,944 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:50,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 05:22:51,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 05:22:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-20 05:22:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:51,175 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 [2022-07-20 05:22:51,447 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 [2022-07-20 05:22:51,488 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 [2022-07-20 05:22:52,503 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-20 05:22:52,503 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 33 treesize of output 26 [2022-07-20 05:22:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:52,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:53,514 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrspn_~s~0#1.base| Int) (v_ArrVal_1705 (Array Int Int)) (|ULTIMATE.start_cstrspn_~s~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1705))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_cstrspn_~s~0#1.base|) |ULTIMATE.start_cstrspn_~s~0#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0))))) is different from false [2022-07-20 05:22:53,520 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:53,521 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 64 treesize of output 42 [2022-07-20 05:22:53,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:53,538 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 111 treesize of output 120 [2022-07-20 05:22:53,549 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:53,549 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 68 treesize of output 64 [2022-07-20 05:22:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:22:53,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875396948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:53,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:22:53,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 63 [2022-07-20 05:22:53,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413474289] [2022-07-20 05:22:53,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:53,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 05:22:53,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:22:53,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 05:22:53,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3607, Unknown=1, NotChecked=120, Total=3906 [2022-07-20 05:22:53,972 INFO L87 Difference]: Start difference. First operand 4568 states and 5101 transitions. Second operand has 63 states, 63 states have (on average 4.841269841269841) internal successors, (305), 63 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:55,640 INFO L93 Difference]: Finished difference Result 8039 states and 9001 transitions. [2022-07-20 05:22:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:22:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.841269841269841) internal successors, (305), 63 states have internal predecessors, (305), 0 states have call successors, (0), 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 124 [2022-07-20 05:22:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:55,649 INFO L225 Difference]: With dead ends: 8039 [2022-07-20 05:22:55,649 INFO L226 Difference]: Without dead ends: 8023 [2022-07-20 05:22:55,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 211 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=422, Invalid=7063, Unknown=1, NotChecked=170, Total=7656 [2022-07-20 05:22:55,651 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 213 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2070 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:55,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2523 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1158 Invalid, 0 Unknown, 2070 Unchecked, 0.4s Time] [2022-07-20 05:22:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2022-07-20 05:22:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 6047. [2022-07-20 05:22:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6047 states, 6045 states have (on average 1.1181141439205955) internal successors, (6759), 6046 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6047 states to 6047 states and 6759 transitions. [2022-07-20 05:22:55,723 INFO L78 Accepts]: Start accepts. Automaton has 6047 states and 6759 transitions. Word has length 124 [2022-07-20 05:22:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:55,724 INFO L495 AbstractCegarLoop]: Abstraction has 6047 states and 6759 transitions. [2022-07-20 05:22:55,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.841269841269841) internal successors, (305), 63 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6047 states and 6759 transitions. [2022-07-20 05:22:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 05:22:55,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:55,731 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:55,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:55,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-20 05:22:55,956 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1206397821, now seen corresponding path program 4 times [2022-07-20 05:22:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:22:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917846424] [2022-07-20 05:22:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:22:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 271 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:22:56,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:22:56,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917846424] [2022-07-20 05:22:56,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917846424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:22:56,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794929567] [2022-07-20 05:22:56,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:22:56,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:22:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:22:56,998 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:22:56,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 05:22:57,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:22:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 05:22:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:57,171 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:57,171 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 [2022-07-20 05:22:57,888 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 [2022-07-20 05:22:57,961 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:57,962 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 [2022-07-20 05:22:57,968 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 7 treesize of output 3 [2022-07-20 05:22:59,701 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:22:59,701 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 34 treesize of output 30 [2022-07-20 05:23:00,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:23:00,217 INFO L356 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2022-07-20 05:23:00,218 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 32 treesize of output 28 [2022-07-20 05:23:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 170 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:23:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:01,894 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:01,895 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 62 treesize of output 40 [2022-07-20 05:23:01,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:01,910 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 103 treesize of output 112 [2022-07-20 05:23:01,918 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:01,919 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 64 treesize of output 62 [2022-07-20 05:23:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 161 proven. 121 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:23:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794929567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:03,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:03,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 29, 29] total 90 [2022-07-20 05:23:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786442802] [2022-07-20 05:23:03,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-20 05:23:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-20 05:23:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=7597, Unknown=11, NotChecked=0, Total=8010 [2022-07-20 05:23:03,363 INFO L87 Difference]: Start difference. First operand 6047 states and 6759 transitions. Second operand has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:12,648 INFO L93 Difference]: Finished difference Result 7646 states and 8475 transitions. [2022-07-20 05:23:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-07-20 05:23:12,649 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 states have internal predecessors, (341), 0 states have call successors, (0), 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 124 [2022-07-20 05:23:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:12,656 INFO L225 Difference]: With dead ends: 7646 [2022-07-20 05:23:12,656 INFO L226 Difference]: Without dead ends: 7630 [2022-07-20 05:23:12,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 213 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10903 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2061, Invalid=39339, Unknown=12, NotChecked=0, Total=41412 [2022-07-20 05:23:12,658 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 579 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 915 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:12,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 2292 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1897 Invalid, 0 Unknown, 915 Unchecked, 0.9s Time] [2022-07-20 05:23:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2022-07-20 05:23:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7159. [2022-07-20 05:23:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7159 states, 7157 states have (on average 1.11373480508593) internal successors, (7971), 7158 states have internal predecessors, (7971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7159 states to 7159 states and 7971 transitions. [2022-07-20 05:23:12,718 INFO L78 Accepts]: Start accepts. Automaton has 7159 states and 7971 transitions. Word has length 124 [2022-07-20 05:23:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:12,718 INFO L495 AbstractCegarLoop]: Abstraction has 7159 states and 7971 transitions. [2022-07-20 05:23:12,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7159 states and 7971 transitions. [2022-07-20 05:23:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-20 05:23:12,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:12,724 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:12,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:12,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-20 05:23:12,925 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1028104865, now seen corresponding path program 15 times [2022-07-20 05:23:12,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:12,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210827378] [2022-07-20 05:23:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:12,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:13,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:13,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210827378] [2022-07-20 05:23:13,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210827378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:13,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835874913] [2022-07-20 05:23:13,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:23:13,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:13,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:13,421 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:13,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 05:23:13,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-20 05:23:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:13,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-20 05:23:13,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:14,185 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 [2022-07-20 05:23:14,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:23:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:14,620 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 [2022-07-20 05:23:14,623 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 [2022-07-20 05:23:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:14,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835874913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:14,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:14,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 52 [2022-07-20 05:23:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573608875] [2022-07-20 05:23:14,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 05:23:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 05:23:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 05:23:14,898 INFO L87 Difference]: Start difference. First operand 7159 states and 7971 transitions. Second operand has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:17,573 INFO L93 Difference]: Finished difference Result 10316 states and 11437 transitions. [2022-07-20 05:23:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 05:23:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-07-20 05:23:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:17,584 INFO L225 Difference]: With dead ends: 10316 [2022-07-20 05:23:17,584 INFO L226 Difference]: Without dead ends: 10213 [2022-07-20 05:23:17,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=546, Invalid=5616, Unknown=0, NotChecked=0, Total=6162 [2022-07-20 05:23:17,585 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 1144 mSDsluCounter, 6440 mSDsCounter, 0 mSdLazyCounter, 5240 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 5314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 5240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:17,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 6678 Invalid, 5314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 5240 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 05:23:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10213 states. [2022-07-20 05:23:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10213 to 8498. [2022-07-20 05:23:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8498 states, 8496 states have (on average 1.1166431261770244) internal successors, (9487), 8497 states have internal predecessors, (9487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8498 states to 8498 states and 9487 transitions. [2022-07-20 05:23:17,675 INFO L78 Accepts]: Start accepts. Automaton has 8498 states and 9487 transitions. Word has length 126 [2022-07-20 05:23:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:17,676 INFO L495 AbstractCegarLoop]: Abstraction has 8498 states and 9487 transitions. [2022-07-20 05:23:17,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 52 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8498 states and 9487 transitions. [2022-07-20 05:23:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-20 05:23:17,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:17,687 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:17,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:17,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-20 05:23:17,887 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash -589496237, now seen corresponding path program 10 times [2022-07-20 05:23:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:17,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898124587] [2022-07-20 05:23:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 41 proven. 416 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:23:18,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:18,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898124587] [2022-07-20 05:23:18,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898124587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:18,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048644962] [2022-07-20 05:23:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:23:18,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:18,249 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:18,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 05:23:18,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:23:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-20 05:23:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:18,421 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:18,421 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 [2022-07-20 05:23:18,873 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 [2022-07-20 05:23:20,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:23:20,047 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 [2022-07-20 05:23:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 217 proven. 240 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:23:20,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:20,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-20 05:23:20,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 05:23:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 202 proven. 255 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:23:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048644962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:21,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 73 [2022-07-20 05:23:21,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702396599] [2022-07-20 05:23:21,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:21,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 05:23:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 05:23:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4798, Unknown=1, NotChecked=0, Total=5256 [2022-07-20 05:23:21,674 INFO L87 Difference]: Start difference. First operand 8498 states and 9487 transitions. Second operand has 73 states, 73 states have (on average 4.616438356164384) internal successors, (337), 73 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:23,685 INFO L93 Difference]: Finished difference Result 8854 states and 9809 transitions. [2022-07-20 05:23:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 05:23:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.616438356164384) internal successors, (337), 73 states have internal predecessors, (337), 0 states have call successors, (0), 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 129 [2022-07-20 05:23:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:23,692 INFO L225 Difference]: With dead ends: 8854 [2022-07-20 05:23:23,692 INFO L226 Difference]: Without dead ends: 8462 [2022-07-20 05:23:23,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1505, Invalid=13014, Unknown=1, NotChecked=0, Total=14520 [2022-07-20 05:23:23,693 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 276 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:23,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1956 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1382 Invalid, 0 Unknown, 446 Unchecked, 0.5s Time] [2022-07-20 05:23:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8462 states. [2022-07-20 05:23:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8462 to 6941. [2022-07-20 05:23:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6939 states have (on average 1.111543450064851) internal successors, (7713), 6940 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 7713 transitions. [2022-07-20 05:23:23,749 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 7713 transitions. Word has length 129 [2022-07-20 05:23:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:23,749 INFO L495 AbstractCegarLoop]: Abstraction has 6941 states and 7713 transitions. [2022-07-20 05:23:23,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.616438356164384) internal successors, (337), 73 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 7713 transitions. [2022-07-20 05:23:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:23:23,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:23,755 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:23,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-20 05:23:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:23,956 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash -590978948, now seen corresponding path program 16 times [2022-07-20 05:23:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497001842] [2022-07-20 05:23:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:23,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:24,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:24,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497001842] [2022-07-20 05:23:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497001842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:24,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473926035] [2022-07-20 05:23:24,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:23:24,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:24,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:24,424 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:24,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 05:23:24,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:23:24,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-20 05:23:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:24,596 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:24,597 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 [2022-07-20 05:23:25,174 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 [2022-07-20 05:23:25,976 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:25,977 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 19 [2022-07-20 05:23:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 200 proven. 372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:27,447 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 [2022-07-20 05:23:27,449 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 [2022-07-20 05:23:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:29,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473926035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:29,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:29,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32, 32] total 89 [2022-07-20 05:23:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106029012] [2022-07-20 05:23:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-20 05:23:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-20 05:23:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=7237, Unknown=0, NotChecked=0, Total=8010 [2022-07-20 05:23:29,032 INFO L87 Difference]: Start difference. First operand 6941 states and 7713 transitions. Second operand has 90 states, 89 states have (on average 4.292134831460674) internal successors, (382), 90 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:34,676 INFO L93 Difference]: Finished difference Result 9538 states and 10565 transitions. [2022-07-20 05:23:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-20 05:23:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.292134831460674) internal successors, (382), 90 states have internal predecessors, (382), 0 states have call successors, (0), 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 130 [2022-07-20 05:23:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:34,684 INFO L225 Difference]: With dead ends: 9538 [2022-07-20 05:23:34,684 INFO L226 Difference]: Without dead ends: 9538 [2022-07-20 05:23:34,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3880, Invalid=16712, Unknown=0, NotChecked=0, Total=20592 [2022-07-20 05:23:34,685 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1495 mSDsluCounter, 4602 mSDsCounter, 0 mSdLazyCounter, 6680 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 4791 SdHoareTripleChecker+Invalid, 7014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 6680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:34,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1495 Valid, 4791 Invalid, 7014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 6680 Invalid, 0 Unknown, 226 Unchecked, 2.7s Time] [2022-07-20 05:23:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9538 states. [2022-07-20 05:23:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 7007. [2022-07-20 05:23:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7005 states have (on average 1.1117773019271948) internal successors, (7788), 7006 states have internal predecessors, (7788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 7788 transitions. [2022-07-20 05:23:34,786 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 7788 transitions. Word has length 130 [2022-07-20 05:23:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:34,786 INFO L495 AbstractCegarLoop]: Abstraction has 7007 states and 7788 transitions. [2022-07-20 05:23:34,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.292134831460674) internal successors, (382), 90 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 7788 transitions. [2022-07-20 05:23:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:23:34,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:34,794 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:34,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:35,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-07-20 05:23:35,010 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:35,011 INFO L85 PathProgramCache]: Analyzing trace with hash -807702295, now seen corresponding path program 5 times [2022-07-20 05:23:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:35,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921466214] [2022-07-20 05:23:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 12 proven. 305 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 05:23:35,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921466214] [2022-07-20 05:23:35,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921466214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445276165] [2022-07-20 05:23:35,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:23:35,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:35,396 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:35,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 05:23:35,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:23:35,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 05:23:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:35,670 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:35,670 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 [2022-07-20 05:23:36,221 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 [2022-07-20 05:23:36,274 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:36,274 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 17 treesize of output 23 [2022-07-20 05:23:36,280 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 8 treesize of output 3 [2022-07-20 05:23:37,126 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:23:37,126 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 13 treesize of output 13 [2022-07-20 05:23:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 103 proven. 221 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:23:38,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:38,525 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:38,526 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 [2022-07-20 05:23:38,531 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:38,531 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 [2022-07-20 05:23:38,534 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 [2022-07-20 05:23:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 16 proven. 302 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:23:39,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445276165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:39,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:39,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 27] total 68 [2022-07-20 05:23:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710785357] [2022-07-20 05:23:39,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:39,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 05:23:39,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 05:23:39,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4336, Unknown=1, NotChecked=0, Total=4556 [2022-07-20 05:23:39,498 INFO L87 Difference]: Start difference. First operand 7007 states and 7788 transitions. Second operand has 68 states, 68 states have (on average 4.8088235294117645) internal successors, (327), 68 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:41,640 INFO L93 Difference]: Finished difference Result 8603 states and 9535 transitions. [2022-07-20 05:23:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 05:23:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.8088235294117645) internal successors, (327), 68 states have internal predecessors, (327), 0 states have call successors, (0), 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 130 [2022-07-20 05:23:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:41,645 INFO L225 Difference]: With dead ends: 8603 [2022-07-20 05:23:41,645 INFO L226 Difference]: Without dead ends: 5963 [2022-07-20 05:23:41,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=528, Invalid=8213, Unknown=1, NotChecked=0, Total=8742 [2022-07-20 05:23:41,646 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 654 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3999 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1767 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:41,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 3999 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2762 Invalid, 0 Unknown, 1767 Unchecked, 1.0s Time] [2022-07-20 05:23:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2022-07-20 05:23:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 4168. [2022-07-20 05:23:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4166 states have (on average 1.1212193951032166) internal successors, (4671), 4167 states have internal predecessors, (4671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 4671 transitions. [2022-07-20 05:23:41,697 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 4671 transitions. Word has length 130 [2022-07-20 05:23:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:41,698 INFO L495 AbstractCegarLoop]: Abstraction has 4168 states and 4671 transitions. [2022-07-20 05:23:41,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.8088235294117645) internal successors, (327), 68 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 4671 transitions. [2022-07-20 05:23:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-20 05:23:41,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:41,702 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2022-07-20 05:23:41,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-20 05:23:41,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:41,915 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 865906500, now seen corresponding path program 12 times [2022-07-20 05:23:41,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222245193] [2022-07-20 05:23:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:41,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:42,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222245193] [2022-07-20 05:23:42,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222245193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885373104] [2022-07-20 05:23:42,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:23:42,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:42,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:42,437 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:42,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-20 05:23:42,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 05:23:42,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-20 05:23:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:42,670 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 [2022-07-20 05:23:43,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:23:43,129 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 [2022-07-20 05:23:45,563 INFO L356 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2022-07-20 05:23:45,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2022-07-20 05:23:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:45,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:46,592 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2054 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2054) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select v_ArrVal_2054 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse0 (select .cse2 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (= 0 .cse0) (not (= .cse1 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (not (= .cse1 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= .cse1 .cse0)))))) is different from false [2022-07-20 05:23:46,599 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:46,600 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 100 treesize of output 67 [2022-07-20 05:23:46,628 INFO L356 Elim1Store]: treesize reduction 45, result has 35.7 percent of original size [2022-07-20 05:23:46,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 124 [2022-07-20 05:23:46,659 INFO L356 Elim1Store]: treesize reduction 32, result has 47.5 percent of original size [2022-07-20 05:23:46,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 90 [2022-07-20 05:23:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 63 proven. 283 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:47,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885373104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:47,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:47,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34, 35] total 85 [2022-07-20 05:23:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818541858] [2022-07-20 05:23:47,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-20 05:23:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-20 05:23:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=6613, Unknown=1, NotChecked=164, Total=7140 [2022-07-20 05:23:47,720 INFO L87 Difference]: Start difference. First operand 4168 states and 4671 transitions. Second operand has 85 states, 85 states have (on average 3.8705882352941177) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:49,292 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (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|) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select .cse2 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (not (= .cse0 .cse1)) (not (= .cse0 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse0)) (= .cse1 0)))) .cse3 (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (= (+ (- 2) |c_ULTIMATE.start_main_~i~0#1|) 0) (forall ((v_ArrVal_2054 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2054) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse5 (select v_ArrVal_2054 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse4 (select .cse6 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (= 0 .cse4) (not (= .cse5 (select .cse6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (not (= .cse5 (select .cse6 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= .cse5 .cse4)))))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (or (and (or (= 7 |c_ULTIMATE.start_main_~length1~0#1|) (= |c_ULTIMATE.start_main_~length1~0#1| 1)) .cse3) (and (= 3 |c_ULTIMATE.start_main_~length1~0#1|) .cse3)))) is different from false [2022-07-20 05:23:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:49,668 INFO L93 Difference]: Finished difference Result 5097 states and 5660 transitions. [2022-07-20 05:23:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 05:23:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.8705882352941177) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 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 131 [2022-07-20 05:23:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:49,673 INFO L225 Difference]: With dead ends: 5097 [2022-07-20 05:23:49,673 INFO L226 Difference]: Without dead ends: 4988 [2022-07-20 05:23:49,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=658, Invalid=12230, Unknown=2, NotChecked=450, Total=13340 [2022-07-20 05:23:49,674 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 202 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:49,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 2456 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1216 Invalid, 0 Unknown, 274 Unchecked, 0.5s Time] [2022-07-20 05:23:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2022-07-20 05:23:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4959. [2022-07-20 05:23:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4957 states have (on average 1.1139802299778092) internal successors, (5522), 4958 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 5522 transitions. [2022-07-20 05:23:49,711 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 5522 transitions. Word has length 131 [2022-07-20 05:23:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:49,712 INFO L495 AbstractCegarLoop]: Abstraction has 4959 states and 5522 transitions. [2022-07-20 05:23:49,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.8705882352941177) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 5522 transitions. [2022-07-20 05:23:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-20 05:23:49,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:49,716 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:49,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-20 05:23:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-20 05:23:49,917 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 377802238, now seen corresponding path program 11 times [2022-07-20 05:23:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:49,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193191218] [2022-07-20 05:23:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:49,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 41 proven. 455 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193191218] [2022-07-20 05:23:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193191218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454214843] [2022-07-20 05:23:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:23:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:50,370 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:50,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-20 05:23:50,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-20 05:23:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:50,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-20 05:23:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:50,667 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:50,668 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 [2022-07-20 05:23:51,157 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 [2022-07-20 05:23:52,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:52,025 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 [2022-07-20 05:23:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 120 proven. 376 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:52,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:53,263 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 [2022-07-20 05:23:53,266 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 [2022-07-20 05:23:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 153 proven. 343 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:23:54,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454214843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:54,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:23:54,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2022-07-20 05:23:54,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162844051] [2022-07-20 05:23:54,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:54,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-20 05:23:54,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:23:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-20 05:23:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=6325, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 05:23:54,137 INFO L87 Difference]: Start difference. First operand 4959 states and 5522 transitions. Second operand has 83 states, 83 states have (on average 4.530120481927711) internal successors, (376), 83 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:58,204 INFO L93 Difference]: Finished difference Result 8459 states and 9363 transitions. [2022-07-20 05:23:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 05:23:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.530120481927711) internal successors, (376), 83 states have internal predecessors, (376), 0 states have call successors, (0), 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 133 [2022-07-20 05:23:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:58,212 INFO L225 Difference]: With dead ends: 8459 [2022-07-20 05:23:58,212 INFO L226 Difference]: Without dead ends: 8300 [2022-07-20 05:23:58,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1318, Invalid=14938, Unknown=0, NotChecked=0, Total=16256 [2022-07-20 05:23:58,213 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1607 mSDsluCounter, 4988 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 7346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1783 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:58,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 5137 Invalid, 7346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 5475 Invalid, 0 Unknown, 1783 Unchecked, 2.1s Time] [2022-07-20 05:23:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2022-07-20 05:23:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 5959. [2022-07-20 05:23:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5959 states, 5957 states have (on average 1.1144871579654188) internal successors, (6639), 5958 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5959 states to 5959 states and 6639 transitions. [2022-07-20 05:23:58,275 INFO L78 Accepts]: Start accepts. Automaton has 5959 states and 6639 transitions. Word has length 133 [2022-07-20 05:23:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:58,276 INFO L495 AbstractCegarLoop]: Abstraction has 5959 states and 6639 transitions. [2022-07-20 05:23:58,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.530120481927711) internal successors, (376), 83 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5959 states and 6639 transitions. [2022-07-20 05:23:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 05:23:58,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:58,280 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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] [2022-07-20 05:23:58,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-20 05:23:58,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:58,480 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:58,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1138351353, now seen corresponding path program 13 times [2022-07-20 05:23:58,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:23:58,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107385976] [2022-07-20 05:23:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:58,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:23:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 326 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:23:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107385976] [2022-07-20 05:23:58,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107385976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:23:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802424880] [2022-07-20 05:23:58,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:23:58,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:23:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:23:58,741 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:23:58,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-20 05:23:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:23:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:59,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:23:59,009 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 [2022-07-20 05:23:59,012 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 10 treesize of output 8 [2022-07-20 05:23:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 66 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:59,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 91 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802424880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:00,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2022-07-20 05:24:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167532589] [2022-07-20 05:24:00,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 05:24:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 05:24:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 05:24:00,407 INFO L87 Difference]: Start difference. First operand 5959 states and 6639 transitions. Second operand has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:01,990 INFO L93 Difference]: Finished difference Result 11881 states and 13267 transitions. [2022-07-20 05:24:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 05:24:01,990 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 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 135 [2022-07-20 05:24:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:02,000 INFO L225 Difference]: With dead ends: 11881 [2022-07-20 05:24:02,000 INFO L226 Difference]: Without dead ends: 11881 [2022-07-20 05:24:02,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1161, Invalid=5159, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 05:24:02,001 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 981 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:02,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 1862 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:24:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2022-07-20 05:24:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 6470. [2022-07-20 05:24:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6470 states, 6468 states have (on average 1.1151824366110081) internal successors, (7213), 6469 states have internal predecessors, (7213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6470 states to 6470 states and 7213 transitions. [2022-07-20 05:24:02,078 INFO L78 Accepts]: Start accepts. Automaton has 6470 states and 7213 transitions. Word has length 135 [2022-07-20 05:24:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:02,078 INFO L495 AbstractCegarLoop]: Abstraction has 6470 states and 7213 transitions. [2022-07-20 05:24:02,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 7.568627450980392) internal successors, (386), 52 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 6470 states and 7213 transitions. [2022-07-20 05:24:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-20 05:24:02,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:02,082 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:02,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-20 05:24:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:02,283 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:24:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1900716246, now seen corresponding path program 12 times [2022-07-20 05:24:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548955562] [2022-07-20 05:24:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:02,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:24:02,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:02,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548955562] [2022-07-20 05:24:02,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548955562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:02,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539687167] [2022-07-20 05:24:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:24:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:02,667 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:24:02,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-20 05:24:02,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-20 05:24:02,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:03,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-20 05:24:03,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:03,276 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 [2022-07-20 05:24:03,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:24:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:24:03,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:03,711 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 [2022-07-20 05:24:03,712 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 [2022-07-20 05:24:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:24:03,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539687167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:03,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:03,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 49 [2022-07-20 05:24:03,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974085418] [2022-07-20 05:24:03,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:03,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 05:24:03,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 05:24:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 05:24:03,900 INFO L87 Difference]: Start difference. First operand 6470 states and 7213 transitions. Second operand has 49 states, 49 states have (on average 4.673469387755102) internal successors, (229), 49 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:06,026 INFO L93 Difference]: Finished difference Result 8198 states and 9075 transitions. [2022-07-20 05:24:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 05:24:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.673469387755102) internal successors, (229), 49 states have internal predecessors, (229), 0 states have call successors, (0), 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 139 [2022-07-20 05:24:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:06,032 INFO L225 Difference]: With dead ends: 8198 [2022-07-20 05:24:06,032 INFO L226 Difference]: Without dead ends: 7507 [2022-07-20 05:24:06,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=511, Invalid=4891, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 05:24:06,033 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 970 mSDsluCounter, 5178 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 5391 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:06,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 5391 Invalid, 4376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3968 Invalid, 0 Unknown, 331 Unchecked, 1.4s Time] [2022-07-20 05:24:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2022-07-20 05:24:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 6217. [2022-07-20 05:24:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6217 states, 6215 states have (on average 1.1142397425583266) internal successors, (6925), 6216 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6217 states to 6217 states and 6925 transitions. [2022-07-20 05:24:06,086 INFO L78 Accepts]: Start accepts. Automaton has 6217 states and 6925 transitions. Word has length 139 [2022-07-20 05:24:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:06,086 INFO L495 AbstractCegarLoop]: Abstraction has 6217 states and 6925 transitions. [2022-07-20 05:24:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.673469387755102) internal successors, (229), 49 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6217 states and 6925 transitions. [2022-07-20 05:24:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 05:24:06,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:06,090 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:06,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:06,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-20 05:24:06,291 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:24:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2041039411, now seen corresponding path program 6 times [2022-07-20 05:24:06,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:06,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497007391] [2022-07-20 05:24:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:06,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 05:24:06,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497007391] [2022-07-20 05:24:06,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497007391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023507558] [2022-07-20 05:24:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:24:06,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:06,589 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:24:06,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-20 05:24:06,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 05:24:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:06,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-20 05:24:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:06,834 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 [2022-07-20 05:24:07,140 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 [2022-07-20 05:24:07,174 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 [2022-07-20 05:24:07,693 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-20 05:24:07,693 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 30 treesize of output 23 [2022-07-20 05:24:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 18 proven. 369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:24:07,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:08,083 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2293 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2293) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-20 05:24:08,087 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:08,087 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 [2022-07-20 05:24:08,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:24:08,091 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 [2022-07-20 05:24:08,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:24:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 13 proven. 374 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:24:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023507558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:08,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 50 [2022-07-20 05:24:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819460072] [2022-07-20 05:24:08,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 05:24:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 05:24:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2211, Unknown=1, NotChecked=94, Total=2450 [2022-07-20 05:24:08,352 INFO L87 Difference]: Start difference. First operand 6217 states and 6925 transitions. Second operand has 50 states, 50 states have (on average 5.0) internal successors, (250), 50 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:09,081 INFO L93 Difference]: Finished difference Result 8799 states and 9820 transitions. [2022-07-20 05:24:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:24:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.0) internal successors, (250), 50 states have internal predecessors, (250), 0 states have call successors, (0), 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 141 [2022-07-20 05:24:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:09,086 INFO L225 Difference]: With dead ends: 8799 [2022-07-20 05:24:09,086 INFO L226 Difference]: Without dead ends: 6561 [2022-07-20 05:24:09,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 246 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=3326, Unknown=1, NotChecked=116, Total=3660 [2022-07-20 05:24:09,087 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 100 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:09,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 3027 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1069 Invalid, 0 Unknown, 444 Unchecked, 0.4s Time] [2022-07-20 05:24:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2022-07-20 05:24:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5629. [2022-07-20 05:24:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 5627 states have (on average 1.1208459214501512) internal successors, (6307), 5628 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 6307 transitions. [2022-07-20 05:24:09,124 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 6307 transitions. Word has length 141 [2022-07-20 05:24:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:09,124 INFO L495 AbstractCegarLoop]: Abstraction has 5629 states and 6307 transitions. [2022-07-20 05:24:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.0) internal successors, (250), 50 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 6307 transitions. [2022-07-20 05:24:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 05:24:09,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:09,127 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:09,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:09,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-20 05:24:09,328 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:24:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash -323469660, now seen corresponding path program 17 times [2022-07-20 05:24:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:09,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631759179] [2022-07-20 05:24:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 414 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:09,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631759179] [2022-07-20 05:24:09,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631759179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:09,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011378730] [2022-07-20 05:24:09,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:24:09,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:09,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:09,743 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:24:09,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-20 05:24:09,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-20 05:24:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:09,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-20 05:24:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:09,998 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:24:09,999 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 [2022-07-20 05:24:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 481 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:10,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 481 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:11,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011378730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:11,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:11,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 74 [2022-07-20 05:24:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367288640] [2022-07-20 05:24:11,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-20 05:24:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-20 05:24:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=4567, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 05:24:11,692 INFO L87 Difference]: Start difference. First operand 5629 states and 6307 transitions. Second operand has 74 states, 74 states have (on average 4.581081081081081) internal successors, (339), 74 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:16,742 INFO L93 Difference]: Finished difference Result 11249 states and 12309 transitions. [2022-07-20 05:24:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-07-20 05:24:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 4.581081081081081) internal successors, (339), 74 states have internal predecessors, (339), 0 states have call successors, (0), 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 142 [2022-07-20 05:24:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:16,751 INFO L225 Difference]: With dead ends: 11249 [2022-07-20 05:24:16,751 INFO L226 Difference]: Without dead ends: 11163 [2022-07-20 05:24:16,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9029 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7064, Invalid=25516, Unknown=0, NotChecked=0, Total=32580 [2022-07-20 05:24:16,753 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2626 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:16,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2626 Valid, 2225 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 05:24:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11163 states. [2022-07-20 05:24:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11163 to 7898. [2022-07-20 05:24:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 7896 states have (on average 1.1291793313069909) internal successors, (8916), 7897 states have internal predecessors, (8916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 8916 transitions. [2022-07-20 05:24:16,829 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 8916 transitions. Word has length 142 [2022-07-20 05:24:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:16,829 INFO L495 AbstractCegarLoop]: Abstraction has 7898 states and 8916 transitions. [2022-07-20 05:24:16,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 4.581081081081081) internal successors, (339), 74 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 8916 transitions. [2022-07-20 05:24:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 05:24:16,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:16,834 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:16,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:17,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-20 05:24:17,035 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:24:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1891650771, now seen corresponding path program 13 times [2022-07-20 05:24:17,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:17,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898680016] [2022-07-20 05:24:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:17,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:24:17,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898680016] [2022-07-20 05:24:17,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898680016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481873625] [2022-07-20 05:24:17,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:24:17,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:17,411 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:24:17,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-20 05:24:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-20 05:24:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 153 proven. 441 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:24:18,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:18,730 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 [2022-07-20 05:24:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 153 proven. 441 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:24:18,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481873625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:18,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:18,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 54 [2022-07-20 05:24:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322945836] [2022-07-20 05:24:18,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:18,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-20 05:24:18,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-20 05:24:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 05:24:18,789 INFO L87 Difference]: Start difference. First operand 7898 states and 8916 transitions. Second operand has 55 states, 54 states have (on average 5.314814814814815) internal successors, (287), 55 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:24:21,432 INFO L93 Difference]: Finished difference Result 11403 states and 12633 transitions. [2022-07-20 05:24:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:24:21,432 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 5.314814814814815) internal successors, (287), 55 states have internal predecessors, (287), 0 states have call successors, (0), 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 143 [2022-07-20 05:24:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:24:21,441 INFO L225 Difference]: With dead ends: 11403 [2022-07-20 05:24:21,441 INFO L226 Difference]: Without dead ends: 10492 [2022-07-20 05:24:21,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1413, Invalid=6069, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 05:24:21,442 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1122 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 4241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:24:21,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 2884 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 4241 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 05:24:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10492 states. [2022-07-20 05:24:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10492 to 5816. [2022-07-20 05:24:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5816 states, 5814 states have (on average 1.1259029927760578) internal successors, (6546), 5815 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5816 states to 5816 states and 6546 transitions. [2022-07-20 05:24:21,504 INFO L78 Accepts]: Start accepts. Automaton has 5816 states and 6546 transitions. Word has length 143 [2022-07-20 05:24:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:24:21,504 INFO L495 AbstractCegarLoop]: Abstraction has 5816 states and 6546 transitions. [2022-07-20 05:24:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 5.314814814814815) internal successors, (287), 55 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:24:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5816 states and 6546 transitions. [2022-07-20 05:24:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-20 05:24:21,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:24:21,508 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:24:21,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-20 05:24:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-20 05:24:21,709 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:24:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:24:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1268672449, now seen corresponding path program 18 times [2022-07-20 05:24:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:24:21,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446770034] [2022-07-20 05:24:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:24:21,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:24:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:24:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:24:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446770034] [2022-07-20 05:24:22,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446770034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:24:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175484984] [2022-07-20 05:24:22,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:24:22,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:24:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:24:22,227 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:24:22,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-20 05:24:22,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-20 05:24:22,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:24:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 05:24:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:24:22,994 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 [2022-07-20 05:24:23,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:24:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:23,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:24:23,403 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 [2022-07-20 05:24:23,404 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 [2022-07-20 05:24:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:24:23,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175484984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:24:23,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:24:23,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 58 [2022-07-20 05:24:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085127705] [2022-07-20 05:24:23,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:24:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-20 05:24:23,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:24:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-20 05:24:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3136, Unknown=0, NotChecked=0, Total=3306 [2022-07-20 05:24:23,686 INFO L87 Difference]: Start difference. First operand 5816 states and 6546 transitions. Second operand has 58 states, 58 states have (on average 4.0) internal successors, (232), 58 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)