./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:55:18,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:55:18,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:55:18,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:55:18,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:55:18,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:55:18,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:55:18,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:55:18,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:55:18,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:55:18,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:55:18,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:55:18,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:55:18,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:55:18,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:55:18,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:55:18,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:55:18,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:55:18,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:55:18,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:55:18,155 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:55:18,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:55:18,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:55:18,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:55:18,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:55:18,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:55:18,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:55:18,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:55:18,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:55:18,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:55:18,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:55:18,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:55:18,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:55:18,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:55:18,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:55:18,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:55:18,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:55:18,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:55:18,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:55:18,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:55:18,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:55:18,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:55:18,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:55:18,206 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:55:18,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:55:18,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:55:18,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:55:18,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:55:18,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:55:18,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:55:18,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:55:18,209 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:55:18,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:55:18,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:55:18,210 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:55:18,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:55:18,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:55:18,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:55:18,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:55:18,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:55:18,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:55:18,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:55:18,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:55:18,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:55:18,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:55:18,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:55:18,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:55:18,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2022-07-21 16:55:18,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:55:18,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:55:18,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:55:18,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:55:18,475 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:55:18,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2022-07-21 16:55:18,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab96e6cb/4f91a507ee1c42069010d57ebbc7a2a5/FLAG695e68598 [2022-07-21 16:55:18,985 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:55:18,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2022-07-21 16:55:18,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab96e6cb/4f91a507ee1c42069010d57ebbc7a2a5/FLAG695e68598 [2022-07-21 16:55:19,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ab96e6cb/4f91a507ee1c42069010d57ebbc7a2a5 [2022-07-21 16:55:19,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:55:19,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:55:19,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:55:19,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:55:19,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:55:19,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f66c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19, skipping insertion in model container [2022-07-21 16:55:19,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:55:19,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:55:19,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:55:19,300 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:55:19,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:55:19,346 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:55:19,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19 WrapperNode [2022-07-21 16:55:19,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:55:19,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:55:19,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:55:19,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:55:19,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,391 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-07-21 16:55:19,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:55:19,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:55:19,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:55:19,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:55:19,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:55:19,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:55:19,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:55:19,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:55:19,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (1/1) ... [2022-07-21 16:55:19,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:55:19,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:19,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 16:55:19,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 16:55:19,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:55:19,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:55:19,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:55:19,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:55:19,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:55:19,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:55:19,606 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:55:19,607 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:55:19,811 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:55:19,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:55:19,815 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 16:55:19,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:19 BoogieIcfgContainer [2022-07-21 16:55:19,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:55:19,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:55:19,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:55:19,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:55:19,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:55:19" (1/3) ... [2022-07-21 16:55:19,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e4e870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:19, skipping insertion in model container [2022-07-21 16:55:19,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:19" (2/3) ... [2022-07-21 16:55:19,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e4e870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:19, skipping insertion in model container [2022-07-21 16:55:19,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:19" (3/3) ... [2022-07-21 16:55:19,837 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2022-07-21 16:55:19,847 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:55:19,848 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-21 16:55:19,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:55:19,900 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@3f4805ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ac38525 [2022-07-21 16:55:19,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-21 16:55:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:19,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:19,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:19,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2022-07-21 16:55:19,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:19,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596425606] [2022-07-21 16:55:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596425606] [2022-07-21 16:55:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596425606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466236230] [2022-07-21 16:55:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:20,130 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,267 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-07-21 16:55:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,285 INFO L225 Difference]: With dead ends: 127 [2022-07-21 16:55:20,285 INFO L226 Difference]: Without dead ends: 121 [2022-07-21 16:55:20,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:20,288 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-21 16:55:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2022-07-21 16:55:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-21 16:55:20,321 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2022-07-21 16:55:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,321 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-21 16:55:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-21 16:55:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:20,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:55:20,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2022-07-21 16:55:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477417188] [2022-07-21 16:55:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477417188] [2022-07-21 16:55:20,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477417188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090199942] [2022-07-21 16:55:20,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:20,372 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,414 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-07-21 16:55:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,418 INFO L225 Difference]: With dead ends: 47 [2022-07-21 16:55:20,418 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 16:55:20,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:20,422 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 16:55:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-07-21 16:55:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.75) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-21 16:55:20,434 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-07-21 16:55:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,434 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-21 16:55:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-21 16:55:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:55:20,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:55:20,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-21 16:55:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283402072] [2022-07-21 16:55:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283402072] [2022-07-21 16:55:20,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283402072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66809020] [2022-07-21 16:55:20,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,515 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,550 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-07-21 16:55:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:55:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,551 INFO L225 Difference]: With dead ends: 78 [2022-07-21 16:55:20,552 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 16:55:20,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,553 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 16:55:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2022-07-21 16:55:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-21 16:55:20,563 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2022-07-21 16:55:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,564 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-21 16:55:20,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-21 16:55:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:55:20,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:55:20,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-21 16:55:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333174003] [2022-07-21 16:55:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333174003] [2022-07-21 16:55:20,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333174003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676668234] [2022-07-21 16:55:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:20,639 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,692 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-07-21 16:55:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:55:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,694 INFO L225 Difference]: With dead ends: 84 [2022-07-21 16:55:20,694 INFO L226 Difference]: Without dead ends: 84 [2022-07-21 16:55:20,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:20,700 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-21 16:55:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2022-07-21 16:55:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-21 16:55:20,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2022-07-21 16:55:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,710 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-21 16:55:20,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-21 16:55:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:55:20,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:55:20,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2022-07-21 16:55:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457446914] [2022-07-21 16:55:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457446914] [2022-07-21 16:55:20,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457446914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803831104] [2022-07-21 16:55:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:20,752 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,769 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-07-21 16:55:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:55:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,770 INFO L225 Difference]: With dead ends: 45 [2022-07-21 16:55:20,771 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 16:55:20,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:20,771 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 16:55:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 16:55:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-07-21 16:55:20,774 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2022-07-21 16:55:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,775 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-07-21 16:55:20,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-07-21 16:55:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:55:20,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:55:20,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2022-07-21 16:55:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049570091] [2022-07-21 16:55:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049570091] [2022-07-21 16:55:20,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049570091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:20,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963375178] [2022-07-21 16:55:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:20,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,823 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,872 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2022-07-21 16:55:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 16:55:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,873 INFO L225 Difference]: With dead ends: 79 [2022-07-21 16:55:20,873 INFO L226 Difference]: Without dead ends: 79 [2022-07-21 16:55:20,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:20,874 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-21 16:55:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2022-07-21 16:55:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-21 16:55:20,877 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2022-07-21 16:55:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,877 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-21 16:55:20,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-21 16:55:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:20,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:55:20,878 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2022-07-21 16:55:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044429308] [2022-07-21 16:55:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044429308] [2022-07-21 16:55:20,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044429308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783712575] [2022-07-21 16:55:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,914 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,933 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-07-21 16:55:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:55:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,934 INFO L225 Difference]: With dead ends: 46 [2022-07-21 16:55:20,934 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 16:55:20,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,935 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 16:55:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-21 16:55:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-21 16:55:20,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2022-07-21 16:55:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,938 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-21 16:55:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-21 16:55:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:20,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 16:55:20,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2022-07-21 16:55:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544913107] [2022-07-21 16:55:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:20,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544913107] [2022-07-21 16:55:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544913107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:20,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:20,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:20,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488423684] [2022-07-21 16:55:20,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:20,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,965 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:20,977 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-07-21 16:55:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:20,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:55:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:20,978 INFO L225 Difference]: With dead ends: 80 [2022-07-21 16:55:20,978 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 16:55:20,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:20,978 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:20,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 16:55:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2022-07-21 16:55:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-21 16:55:20,981 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2022-07-21 16:55:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:20,982 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-21 16:55:20,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-21 16:55:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:20,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:20,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:20,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:55:20,983 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2022-07-21 16:55:20,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:20,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209685146] [2022-07-21 16:55:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:20,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209685146] [2022-07-21 16:55:21,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209685146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:21,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:21,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:21,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722880298] [2022-07-21 16:55:21,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:21,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:21,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:21,002 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:21,017 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-21 16:55:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:55:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:21,018 INFO L225 Difference]: With dead ends: 55 [2022-07-21 16:55:21,019 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 16:55:21,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:21,019 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:21,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 16:55:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-21 16:55:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.488888888888889) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-21 16:55:21,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2022-07-21 16:55:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:21,022 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-21 16:55:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-21 16:55:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:21,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:21,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 16:55:21,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2022-07-21 16:55:21,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:21,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382582438] [2022-07-21 16:55:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382582438] [2022-07-21 16:55:21,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382582438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:21,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:21,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:55:21,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735616969] [2022-07-21 16:55:21,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:21,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:21,069 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:21,125 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2022-07-21 16:55:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:55:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:55:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:21,126 INFO L225 Difference]: With dead ends: 107 [2022-07-21 16:55:21,126 INFO L226 Difference]: Without dead ends: 107 [2022-07-21 16:55:21,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:55:21,127 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:21,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-21 16:55:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2022-07-21 16:55:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-21 16:55:21,129 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2022-07-21 16:55:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:21,130 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-21 16:55:21,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-21 16:55:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:21,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:21,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 16:55:21,131 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2022-07-21 16:55:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:21,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539082283] [2022-07-21 16:55:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:21,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539082283] [2022-07-21 16:55:21,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539082283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:21,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:21,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724666490] [2022-07-21 16:55:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:21,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:21,175 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:21,240 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-07-21 16:55:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:55:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:21,241 INFO L225 Difference]: With dead ends: 81 [2022-07-21 16:55:21,241 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 16:55:21,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:21,242 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:21,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 16:55:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-07-21 16:55:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.5) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-07-21 16:55:21,245 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2022-07-21 16:55:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:21,245 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-07-21 16:55:21,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-07-21 16:55:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:55:21,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:21,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:55:21,246 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2022-07-21 16:55:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:21,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730311393] [2022-07-21 16:55:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:21,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:21,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730311393] [2022-07-21 16:55:21,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730311393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:21,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:21,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:21,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482877209] [2022-07-21 16:55:21,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:21,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:21,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:21,316 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:21,360 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-07-21 16:55:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:21,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 16:55:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:21,361 INFO L225 Difference]: With dead ends: 83 [2022-07-21 16:55:21,361 INFO L226 Difference]: Without dead ends: 83 [2022-07-21 16:55:21,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:21,367 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:21,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-21 16:55:21,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2022-07-21 16:55:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-07-21 16:55:21,369 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2022-07-21 16:55:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:21,369 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-07-21 16:55:21,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-07-21 16:55:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:55:21,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:21,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 16:55:21,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2022-07-21 16:55:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:21,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428270647] [2022-07-21 16:55:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:21,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428270647] [2022-07-21 16:55:21,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428270647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:21,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:21,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:21,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472921432] [2022-07-21 16:55:21,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:21,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:21,401 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:21,426 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-07-21 16:55:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 16:55:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:21,427 INFO L225 Difference]: With dead ends: 63 [2022-07-21 16:55:21,427 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 16:55:21,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:21,428 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:21,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 16:55:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-07-21 16:55:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-21 16:55:21,429 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2022-07-21 16:55:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:21,429 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-21 16:55:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-21 16:55:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:55:21,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:21,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 16:55:21,430 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2022-07-21 16:55:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984115027] [2022-07-21 16:55:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984115027] [2022-07-21 16:55:21,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984115027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250336697] [2022-07-21 16:55:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:21,472 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:21,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:55:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:21,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:55:21,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:21,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:21,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:21,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250336697] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:21,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:21,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-21 16:55:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780706302] [2022-07-21 16:55:21,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:55:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:55:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:21,737 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:21,835 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2022-07-21 16:55:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:55:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 16:55:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:21,836 INFO L225 Difference]: With dead ends: 122 [2022-07-21 16:55:21,836 INFO L226 Difference]: Without dead ends: 122 [2022-07-21 16:55:21,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:21,837 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 266 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:21,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 184 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-21 16:55:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2022-07-21 16:55:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-07-21 16:55:21,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2022-07-21 16:55:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:21,839 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-07-21 16:55:21,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-07-21 16:55:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:55:21,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:21,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:21,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 16:55:22,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 16:55:22,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:22,056 INFO L85 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2022-07-21 16:55:22,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:22,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063948473] [2022-07-21 16:55:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:22,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:22,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063948473] [2022-07-21 16:55:22,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063948473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:22,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:22,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717266142] [2022-07-21 16:55:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:22,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:22,077 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:22,099 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-07-21 16:55:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:22,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:55:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:22,100 INFO L225 Difference]: With dead ends: 51 [2022-07-21 16:55:22,100 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 16:55:22,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:22,101 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:22,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 16:55:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 16:55:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-07-21 16:55:22,102 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2022-07-21 16:55:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:22,103 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-07-21 16:55:22,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-07-21 16:55:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:55:22,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:22,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:22,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:55:22,104 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2022-07-21 16:55:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:22,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000526120] [2022-07-21 16:55:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:22,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000526120] [2022-07-21 16:55:22,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000526120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:22,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:22,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576313046] [2022-07-21 16:55:22,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:22,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:22,154 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:22,192 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-21 16:55:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:55:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:22,193 INFO L225 Difference]: With dead ends: 55 [2022-07-21 16:55:22,193 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 16:55:22,193 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 [2022-07-21 16:55:22,194 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 65 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 16:55:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-21 16:55:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-07-21 16:55:22,195 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2022-07-21 16:55:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:22,195 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-07-21 16:55:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-07-21 16:55:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:55:22,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:22,196 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 16:55:22,196 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2022-07-21 16:55:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807223820] [2022-07-21 16:55:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807223820] [2022-07-21 16:55:22,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807223820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958638548] [2022-07-21 16:55:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:22,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:22,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:22,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:22,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:55:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 16:55:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:22,305 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:22,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958638548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:22,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:22,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-07-21 16:55:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81189866] [2022-07-21 16:55:22,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:22,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:55:22,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:55:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:22,465 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:22,629 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-21 16:55:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:55:22,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 16:55:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:22,630 INFO L225 Difference]: With dead ends: 95 [2022-07-21 16:55:22,630 INFO L226 Difference]: Without dead ends: 95 [2022-07-21 16:55:22,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:55:22,631 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:22,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 164 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-21 16:55:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2022-07-21 16:55:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-21 16:55:22,632 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2022-07-21 16:55:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:22,633 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-21 16:55:22,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-21 16:55:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:22,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:22,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:22,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 16:55:22,847 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2022-07-21 16:55:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572974431] [2022-07-21 16:55:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:22,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572974431] [2022-07-21 16:55:22,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572974431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:22,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:22,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963535386] [2022-07-21 16:55:22,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:22,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:22,877 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:22,902 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-07-21 16:55:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:22,903 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 [2022-07-21 16:55:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:22,903 INFO L225 Difference]: With dead ends: 48 [2022-07-21 16:55:22,903 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 16:55:22,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:22,904 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:22,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 16:55:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 16:55:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-07-21 16:55:22,905 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2022-07-21 16:55:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:22,905 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-07-21 16:55:22,905 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) [2022-07-21 16:55:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-07-21 16:55:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:22,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:22,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:22,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 16:55:22,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2022-07-21 16:55:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:22,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323118043] [2022-07-21 16:55:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323118043] [2022-07-21 16:55:22,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323118043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:22,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:22,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:55:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333721552] [2022-07-21 16:55:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:22,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:55:22,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:55:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:22,956 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:23,011 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-07-21 16:55:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:23,012 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 [2022-07-21 16:55:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:23,012 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:55:23,012 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 16:55:23,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:23,013 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:23,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 16:55:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-07-21 16:55:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-21 16:55:23,014 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2022-07-21 16:55:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:23,014 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-21 16:55:23,014 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) [2022-07-21 16:55:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-21 16:55:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:23,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:23,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:23,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 16:55:23,015 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:23,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:23,015 INFO L85 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2022-07-21 16:55:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:23,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147362630] [2022-07-21 16:55:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:23,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147362630] [2022-07-21 16:55:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147362630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384924739] [2022-07-21 16:55:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:23,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:23,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:23,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:55:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:23,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 16:55:23,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:23,125 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 11 treesize of output 7 [2022-07-21 16:55:23,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:23,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:55:23,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384924739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:23,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:55:23,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-07-21 16:55:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118959457] [2022-07-21 16:55:23,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:23,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:55:23,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:23,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:55:23,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:55:23,155 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:23,207 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2022-07-21 16:55:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:55:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 16:55:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:23,208 INFO L225 Difference]: With dead ends: 75 [2022-07-21 16:55:23,208 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 16:55:23,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:55:23,209 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:23,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 178 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 16:55:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2022-07-21 16:55:23,210 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) [2022-07-21 16:55:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-21 16:55:23,210 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 16 [2022-07-21 16:55:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:23,211 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-21 16:55:23,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-21 16:55:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:23,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:23,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:23,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:23,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:23,423 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 876377546, now seen corresponding path program 1 times [2022-07-21 16:55:23,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508934024] [2022-07-21 16:55:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:23,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:23,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508934024] [2022-07-21 16:55:23,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508934024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:23,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136683879] [2022-07-21 16:55:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:23,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:23,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:23,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:23,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:55:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:55:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:23,544 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:23,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:23,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:23,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136683879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:23,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:23,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-07-21 16:55:23,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871537798] [2022-07-21 16:55:23,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:23,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:55:23,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:23,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:55:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:23,689 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:23,768 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-07-21 16:55:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:55:23,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 16:55:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:23,768 INFO L225 Difference]: With dead ends: 76 [2022-07-21 16:55:23,768 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 16:55:23,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 16:55:23,769 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:23,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 121 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 16:55:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2022-07-21 16:55:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-07-21 16:55:23,771 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 16 [2022-07-21 16:55:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:23,771 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-07-21 16:55:23,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-07-21 16:55:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 16:55:23,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:23,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:23,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:23,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:23,987 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2022-07-21 16:55:23,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:23,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357753782] [2022-07-21 16:55:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357753782] [2022-07-21 16:55:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357753782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:24,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363800552] [2022-07-21 16:55:24,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:24,011 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,037 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-07-21 16:55:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-21 16:55:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,039 INFO L225 Difference]: With dead ends: 61 [2022-07-21 16:55:24,039 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 16:55:24,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:24,040 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 16:55:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-21 16:55:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.263157894736842) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-07-21 16:55:24,048 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2022-07-21 16:55:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,048 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-07-21 16:55:24,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-07-21 16:55:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 16:55:24,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 16:55:24,050 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2022-07-21 16:55:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303628176] [2022-07-21 16:55:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303628176] [2022-07-21 16:55:24,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303628176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245244893] [2022-07-21 16:55:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:24,098 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,146 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-21 16:55:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-21 16:55:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,147 INFO L225 Difference]: With dead ends: 65 [2022-07-21 16:55:24,147 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 16:55:24,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:24,148 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 16:55:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-21 16:55:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.25) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-07-21 16:55:24,150 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 17 [2022-07-21 16:55:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,150 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-07-21 16:55:24,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-07-21 16:55:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 16:55:24,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 16:55:24,151 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 2 times [2022-07-21 16:55:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486324472] [2022-07-21 16:55:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486324472] [2022-07-21 16:55:24,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486324472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:55:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356552471] [2022-07-21 16:55:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:55:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:55:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:24,233 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,354 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-07-21 16:55:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 16:55:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,355 INFO L225 Difference]: With dead ends: 91 [2022-07-21 16:55:24,355 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:55:24,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:55:24,356 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 109 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 160 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:55:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2022-07-21 16:55:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-21 16:55:24,357 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2022-07-21 16:55:24,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,357 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-21 16:55:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-21 16:55:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 16:55:24,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 16:55:24,358 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2022-07-21 16:55:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379008170] [2022-07-21 16:55:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379008170] [2022-07-21 16:55:24,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379008170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:55:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281137500] [2022-07-21 16:55:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:55:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:55:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:24,452 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,543 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-07-21 16:55:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:24,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 16:55:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,543 INFO L225 Difference]: With dead ends: 82 [2022-07-21 16:55:24,543 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 16:55:24,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:24,544 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 16:55:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2022-07-21 16:55:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-21 16:55:24,545 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2022-07-21 16:55:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,546 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-21 16:55:24,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-21 16:55:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:55:24,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,546 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 16:55:24,546 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2022-07-21 16:55:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212449915] [2022-07-21 16:55:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212449915] [2022-07-21 16:55:24,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212449915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 16:55:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782173225] [2022-07-21 16:55:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:55:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:55:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:55:24,608 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,680 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2022-07-21 16:55:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:55:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:55:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,681 INFO L225 Difference]: With dead ends: 100 [2022-07-21 16:55:24,681 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 16:55:24,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:55:24,682 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 190 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 16:55:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-07-21 16:55:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-07-21 16:55:24,684 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 20 [2022-07-21 16:55:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,684 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-07-21 16:55:24,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-07-21 16:55:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:55:24,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,685 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 16:55:24,685 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2022-07-21 16:55:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51620672] [2022-07-21 16:55:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51620672] [2022-07-21 16:55:24,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51620672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 16:55:24,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173250534] [2022-07-21 16:55:24,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:55:24,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:55:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:24,762 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,944 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2022-07-21 16:55:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:55:24,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:55:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,945 INFO L225 Difference]: With dead ends: 122 [2022-07-21 16:55:24,945 INFO L226 Difference]: Without dead ends: 122 [2022-07-21 16:55:24,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:55:24,945 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 200 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-21 16:55:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2022-07-21 16:55:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-07-21 16:55:24,947 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 20 [2022-07-21 16:55:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,947 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-07-21 16:55:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-07-21 16:55:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:55:24,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,947 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 16:55:24,948 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2022-07-21 16:55:24,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421832670] [2022-07-21 16:55:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:25,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421832670] [2022-07-21 16:55:25,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421832670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:25,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:25,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 16:55:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244717297] [2022-07-21 16:55:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:25,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:55:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:55:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:55:25,080 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:25,285 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2022-07-21 16:55:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:25,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:55:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:25,286 INFO L225 Difference]: With dead ends: 146 [2022-07-21 16:55:25,286 INFO L226 Difference]: Without dead ends: 146 [2022-07-21 16:55:25,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-21 16:55:25,287 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:25,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 194 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-21 16:55:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2022-07-21 16:55:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.27) internal successors, (127), 103 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-07-21 16:55:25,299 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 20 [2022-07-21 16:55:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:25,299 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-07-21 16:55:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-07-21 16:55:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:55:25,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:25,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:25,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 16:55:25,300 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2022-07-21 16:55:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:25,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83021117] [2022-07-21 16:55:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83021117] [2022-07-21 16:55:25,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83021117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:25,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:25,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019642424] [2022-07-21 16:55:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:25,361 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:25,373 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-07-21 16:55:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:55:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:25,374 INFO L225 Difference]: With dead ends: 103 [2022-07-21 16:55:25,374 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 16:55:25,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:25,375 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:25,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 16:55:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-21 16:55:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-07-21 16:55:25,377 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 21 [2022-07-21 16:55:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:25,377 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-07-21 16:55:25,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-07-21 16:55:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:55:25,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:25,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:25,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 16:55:25,378 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2022-07-21 16:55:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110460076] [2022-07-21 16:55:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110460076] [2022-07-21 16:55:25,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110460076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:25,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980598055] [2022-07-21 16:55:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:25,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:25,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:55:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 16:55:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:25,523 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:25,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980598055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:25,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:25,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-07-21 16:55:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636182443] [2022-07-21 16:55:25,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:25,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 16:55:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 16:55:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:55:25,772 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:26,108 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2022-07-21 16:55:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:55:26,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 16:55:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:26,109 INFO L225 Difference]: With dead ends: 129 [2022-07-21 16:55:26,109 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 16:55:26,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:55:26,110 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 229 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:26,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 200 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 16:55:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2022-07-21 16:55:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-07-21 16:55:26,112 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2022-07-21 16:55:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:26,112 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-07-21 16:55:26,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-07-21 16:55:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 16:55:26,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:26,112 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:26,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:26,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:26,313 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2022-07-21 16:55:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:26,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481335712] [2022-07-21 16:55:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481335712] [2022-07-21 16:55:26,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481335712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214377728] [2022-07-21 16:55:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:26,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:26,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:26,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:55:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 16:55:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:26,535 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:26,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214377728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:26,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:26,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-21 16:55:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125650496] [2022-07-21 16:55:26,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:26,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 16:55:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 16:55:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:55:26,803 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,292 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2022-07-21 16:55:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 16:55:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-21 16:55:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,293 INFO L225 Difference]: With dead ends: 130 [2022-07-21 16:55:27,293 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 16:55:27,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:55:27,294 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 406 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 139 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 16:55:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2022-07-21 16:55:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1875) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2022-07-21 16:55:27,296 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 24 [2022-07-21 16:55:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,296 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2022-07-21 16:55:27,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2022-07-21 16:55:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 16:55:27,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,297 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:27,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:27,514 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2022-07-21 16:55:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017980932] [2022-07-21 16:55:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017980932] [2022-07-21 16:55:27,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017980932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:27,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490306536] [2022-07-21 16:55:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:27,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:27,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:55:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:55:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:27,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:27,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490306536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:27,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:27,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-07-21 16:55:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277052211] [2022-07-21 16:55:27,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 16:55:27,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 16:55:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:55:27,942 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:28,243 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2022-07-21 16:55:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-21 16:55:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:28,244 INFO L225 Difference]: With dead ends: 141 [2022-07-21 16:55:28,244 INFO L226 Difference]: Without dead ends: 141 [2022-07-21 16:55:28,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:55:28,244 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 164 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:28,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 271 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-21 16:55:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2022-07-21 16:55:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-07-21 16:55:28,247 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 24 [2022-07-21 16:55:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:28,247 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-07-21 16:55:28,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-07-21 16:55:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 16:55:28,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:28,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:28,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:28,467 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2022-07-21 16:55:28,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:28,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455520578] [2022-07-21 16:55:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:28,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:28,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455520578] [2022-07-21 16:55:28,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455520578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:28,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603864843] [2022-07-21 16:55:28,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:28,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:28,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:28,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:55:28,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:28,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 16:55:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:28,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:28,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:28,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:28,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:55:28,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:55:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:29,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603864843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:29,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:29,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-07-21 16:55:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113070856] [2022-07-21 16:55:29,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:29,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 16:55:29,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 16:55:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:55:29,044 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:29,255 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-07-21 16:55:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:55:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 16:55:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:29,256 INFO L225 Difference]: With dead ends: 178 [2022-07-21 16:55:29,256 INFO L226 Difference]: Without dead ends: 170 [2022-07-21 16:55:29,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-07-21 16:55:29,257 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:29,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 379 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-21 16:55:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-21 16:55:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2022-07-21 16:55:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2022-07-21 16:55:29,259 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 26 [2022-07-21 16:55:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:29,259 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2022-07-21 16:55:29,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2022-07-21 16:55:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:55:29,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:29,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:29,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 16:55:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 16:55:29,468 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1149798068, now seen corresponding path program 1 times [2022-07-21 16:55:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:29,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711562893] [2022-07-21 16:55:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:55:29,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:29,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711562893] [2022-07-21 16:55:29,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711562893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:29,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:55:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351768191] [2022-07-21 16:55:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:29,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:55:29,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:55:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:29,573 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:29,660 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2022-07-21 16:55:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:55:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:29,661 INFO L225 Difference]: With dead ends: 156 [2022-07-21 16:55:29,661 INFO L226 Difference]: Without dead ends: 140 [2022-07-21 16:55:29,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:29,662 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:29,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 136 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-21 16:55:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2022-07-21 16:55:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-07-21 16:55:29,664 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 27 [2022-07-21 16:55:29,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:29,664 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-07-21 16:55:29,664 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) [2022-07-21 16:55:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-07-21 16:55:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 16:55:29,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:29,665 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:29,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 16:55:29,665 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2022-07-21 16:55:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:29,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77512057] [2022-07-21 16:55:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:29,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:29,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77512057] [2022-07-21 16:55:29,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77512057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893198915] [2022-07-21 16:55:29,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:29,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:29,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:55:29,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:29,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 16:55:29,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:29,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:29,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:29,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:55:30,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:55:30,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:30,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:30,053 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:55:30,071 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:55:30,099 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_400) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:55:30,104 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:30,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:55:30,108 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:30,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:55:30,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-21 16:55:30,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893198915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:30,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:30,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-07-21 16:55:30,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448859509] [2022-07-21 16:55:30,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:55:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:55:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=435, Unknown=3, NotChecked=132, Total=650 [2022-07-21 16:55:30,215 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:30,418 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-07-21 16:55:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:55:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-21 16:55:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:30,419 INFO L225 Difference]: With dead ends: 187 [2022-07-21 16:55:30,419 INFO L226 Difference]: Without dead ends: 157 [2022-07-21 16:55:30,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=651, Unknown=3, NotChecked=162, Total=930 [2022-07-21 16:55:30,419 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:30,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 306 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-07-21 16:55:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-21 16:55:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2022-07-21 16:55:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 147 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2022-07-21 16:55:30,421 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 28 [2022-07-21 16:55:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:30,422 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2022-07-21 16:55:30,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2022-07-21 16:55:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:55:30,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:30,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:30,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 16:55:30,627 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2022-07-21 16:55:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:30,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707871735] [2022-07-21 16:55:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707871735] [2022-07-21 16:55:30,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707871735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:30,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084573745] [2022-07-21 16:55:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:30,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:30,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:55:30,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:55:30,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:55:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:30,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:30,991 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:30,991 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 [2022-07-21 16:55:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:31,289 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 [2022-07-21 16:55:31,293 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 [2022-07-21 16:55:31,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-07-21 16:55:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084573745] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:31,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:31,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-07-21 16:55:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254134911] [2022-07-21 16:55:31,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 16:55:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 16:55:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:55:31,323 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,629 INFO L93 Difference]: Finished difference Result 192 states and 215 transitions. [2022-07-21 16:55:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:55:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-21 16:55:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,630 INFO L225 Difference]: With dead ends: 192 [2022-07-21 16:55:31,630 INFO L226 Difference]: Without dead ends: 192 [2022-07-21 16:55:31,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 16:55:31,630 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 126 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 293 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 327 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-07-21 16:55:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-21 16:55:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2022-07-21 16:55:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 154 states have (on average 1.155844155844156) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2022-07-21 16:55:31,633 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 30 [2022-07-21 16:55:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,633 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2022-07-21 16:55:31,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2022-07-21 16:55:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 16:55:31,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,633 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:31,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 16:55:31,834 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2022-07-21 16:55:31,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854186186] [2022-07-21 16:55:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854186186] [2022-07-21 16:55:31,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854186186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:31,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589782390] [2022-07-21 16:55:31,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:31,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:31,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:31,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:31,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:55:32,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:55:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:55:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:32,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:32,270 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 [2022-07-21 16:55:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:32,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589782390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:32,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:32,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-21 16:55:32,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702289254] [2022-07-21 16:55:32,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:32,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:55:32,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:55:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:55:32,290 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:32,631 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-07-21 16:55:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:55:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-21 16:55:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:32,632 INFO L225 Difference]: With dead ends: 169 [2022-07-21 16:55:32,632 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 16:55:32,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 16:55:32,633 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:32,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 466 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 16:55:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2022-07-21 16:55:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.150943396226415) internal successors, (183), 161 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2022-07-21 16:55:32,635 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 32 [2022-07-21 16:55:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:32,635 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2022-07-21 16:55:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2022-07-21 16:55:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 16:55:32,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:32,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:32,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:32,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 16:55:32,841 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2022-07-21 16:55:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:32,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644957184] [2022-07-21 16:55:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644957184] [2022-07-21 16:55:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644957184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643387253] [2022-07-21 16:55:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:32,934 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:32,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:55:32,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 16:55:32,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:33,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:33,301 INFO L356 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2022-07-21 16:55:33,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-07-21 16:55:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:33,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:33,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-07-21 16:55:33,428 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-21 16:55:33,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 60 [2022-07-21 16:55:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:33,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643387253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:33,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:33,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 35 [2022-07-21 16:55:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806014910] [2022-07-21 16:55:33,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:55:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:55:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:55:33,544 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:34,150 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2022-07-21 16:55:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 16:55:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-21 16:55:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:34,151 INFO L225 Difference]: With dead ends: 218 [2022-07-21 16:55:34,151 INFO L226 Difference]: Without dead ends: 207 [2022-07-21 16:55:34,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=2637, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 16:55:34,152 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:34,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 332 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 299 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-07-21 16:55:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-21 16:55:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2022-07-21 16:55:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 193 states have (on average 1.145077720207254) internal successors, (221), 195 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2022-07-21 16:55:34,156 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 33 [2022-07-21 16:55:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:34,156 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2022-07-21 16:55:34,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2022-07-21 16:55:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 16:55:34,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:34,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:34,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 16:55:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 16:55:34,375 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 1 times [2022-07-21 16:55:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:34,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134470289] [2022-07-21 16:55:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:34,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134470289] [2022-07-21 16:55:34,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134470289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:34,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820701561] [2022-07-21 16:55:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:34,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:34,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:55:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 16:55:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:34,581 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:34,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820701561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:34,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:34,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-07-21 16:55:34,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796476806] [2022-07-21 16:55:34,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:34,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 16:55:34,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 16:55:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:55:34,991 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:35,646 INFO L93 Difference]: Finished difference Result 227 states and 249 transitions. [2022-07-21 16:55:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:55:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-21 16:55:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:35,647 INFO L225 Difference]: With dead ends: 227 [2022-07-21 16:55:35,648 INFO L226 Difference]: Without dead ends: 227 [2022-07-21 16:55:35,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:55:35,648 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 395 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:35,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 230 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-21 16:55:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2022-07-21 16:55:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2022-07-21 16:55:35,651 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 33 [2022-07-21 16:55:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:35,652 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2022-07-21 16:55:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2022-07-21 16:55:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 16:55:35,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:35,652 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:35,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:35,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 16:55:35,872 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2022-07-21 16:55:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:35,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259688707] [2022-07-21 16:55:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:36,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259688707] [2022-07-21 16:55:36,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259688707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66734646] [2022-07-21 16:55:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:36,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:36,208 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:36,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:55:36,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 16:55:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:36,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:36,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:36,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:36,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:36,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:36,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:36,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:36,840 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-21 16:55:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:36,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:39,188 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:39,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:55:39,195 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:39,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:55:39,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:55:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:39,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66734646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:39,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:39,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 42 [2022-07-21 16:55:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620939027] [2022-07-21 16:55:39,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:39,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 16:55:39,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 16:55:39,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1576, Unknown=12, NotChecked=0, Total=1722 [2022-07-21 16:55:39,581 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:42,744 INFO L93 Difference]: Finished difference Result 277 states and 311 transitions. [2022-07-21 16:55:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 16:55:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 16:55:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:42,745 INFO L225 Difference]: With dead ends: 277 [2022-07-21 16:55:42,745 INFO L226 Difference]: Without dead ends: 258 [2022-07-21 16:55:42,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=382, Invalid=3637, Unknown=13, NotChecked=0, Total=4032 [2022-07-21 16:55:42,746 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 126 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:42,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 684 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 307 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-07-21 16:55:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-21 16:55:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2022-07-21 16:55:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 246 states have (on average 1.1341463414634145) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2022-07-21 16:55:42,754 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 36 [2022-07-21 16:55:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:42,754 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2022-07-21 16:55:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2022-07-21 16:55:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 16:55:42,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:42,755 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:42,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:42,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:42,963 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2022-07-21 16:55:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843802769] [2022-07-21 16:55:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:42,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:43,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843802769] [2022-07-21 16:55:43,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843802769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:43,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972415677] [2022-07-21 16:55:43,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:55:43,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:43,107 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:43,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:55:43,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 16:55:43,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 16:55:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:43,188 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:43,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:43,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972415677] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:43,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-07-21 16:55:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089225426] [2022-07-21 16:55:43,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:43,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 16:55:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 16:55:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-07-21 16:55:43,638 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:44,240 INFO L93 Difference]: Finished difference Result 389 states and 424 transitions. [2022-07-21 16:55:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:55:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-21 16:55:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:44,241 INFO L225 Difference]: With dead ends: 389 [2022-07-21 16:55:44,242 INFO L226 Difference]: Without dead ends: 389 [2022-07-21 16:55:44,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 16:55:44,242 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 337 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:44,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 364 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:55:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-21 16:55:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 258. [2022-07-21 16:55:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 255 states have (on average 1.1372549019607843) internal successors, (290), 257 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 290 transitions. [2022-07-21 16:55:44,246 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 290 transitions. Word has length 37 [2022-07-21 16:55:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:44,247 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 290 transitions. [2022-07-21 16:55:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 290 transitions. [2022-07-21 16:55:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 16:55:44,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:44,247 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:44,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 16:55:44,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:44,463 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:44,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 1 times [2022-07-21 16:55:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:44,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908601780] [2022-07-21 16:55:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:44,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908601780] [2022-07-21 16:55:44,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908601780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841399414] [2022-07-21 16:55:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:44,608 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:44,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:55:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 16:55:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:44,691 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:44,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841399414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:45,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:45,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-07-21 16:55:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972387177] [2022-07-21 16:55:45,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:55:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:55:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:55:45,196 INFO L87 Difference]: Start difference. First operand 258 states and 290 transitions. Second operand has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:46,494 INFO L93 Difference]: Finished difference Result 342 states and 371 transitions. [2022-07-21 16:55:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 16:55:46,494 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 16:55:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:46,495 INFO L225 Difference]: With dead ends: 342 [2022-07-21 16:55:46,495 INFO L226 Difference]: Without dead ends: 317 [2022-07-21 16:55:46,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 16:55:46,496 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 413 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:46,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 409 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:55:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-21 16:55:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 256. [2022-07-21 16:55:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 255 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2022-07-21 16:55:46,500 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 39 [2022-07-21 16:55:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:46,500 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2022-07-21 16:55:46,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2022-07-21 16:55:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:55:46,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:46,501 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:46,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:46,718 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2022-07-21 16:55:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:46,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389650347] [2022-07-21 16:55:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389650347] [2022-07-21 16:55:46,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389650347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861946008] [2022-07-21 16:55:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:55:46,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:46,881 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:46,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:55:46,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 16:55:46,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 16:55:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:47,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:47,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:47,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:55:47,158 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 26 treesize of output 22 [2022-07-21 16:55:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861946008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:47,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:47,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-07-21 16:55:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367411210] [2022-07-21 16:55:47,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:47,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:55:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:55:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:55:47,263 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:47,685 INFO L93 Difference]: Finished difference Result 488 states and 529 transitions. [2022-07-21 16:55:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:55:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-21 16:55:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:47,688 INFO L225 Difference]: With dead ends: 488 [2022-07-21 16:55:47,688 INFO L226 Difference]: Without dead ends: 460 [2022-07-21 16:55:47,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 16:55:47,689 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:47,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 635 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:55:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-21 16:55:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 291. [2022-07-21 16:55:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 1.1284722222222223) internal successors, (325), 290 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2022-07-21 16:55:47,694 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 40 [2022-07-21 16:55:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:47,694 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2022-07-21 16:55:47,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2022-07-21 16:55:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:55:47,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:47,695 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:47,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 16:55:47,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:47,912 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2022-07-21 16:55:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:47,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267451701] [2022-07-21 16:55:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:48,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:48,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267451701] [2022-07-21 16:55:48,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267451701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:48,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040463666] [2022-07-21 16:55:48,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:55:48,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:48,028 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:48,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:55:48,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:55:48,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 16:55:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:48,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:48,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:48,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:48,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:48,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040463666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:48,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:48,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-07-21 16:55:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825753162] [2022-07-21 16:55:48,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 16:55:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 16:55:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:55:48,542 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:49,093 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2022-07-21 16:55:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 16:55:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-21 16:55:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:49,095 INFO L225 Difference]: With dead ends: 387 [2022-07-21 16:55:49,095 INFO L226 Difference]: Without dead ends: 387 [2022-07-21 16:55:49,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:55:49,095 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 286 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:49,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 469 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-21 16:55:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 329. [2022-07-21 16:55:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 326 states have (on average 1.138036809815951) internal successors, (371), 328 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 371 transitions. [2022-07-21 16:55:49,100 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 371 transitions. Word has length 40 [2022-07-21 16:55:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:49,100 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 371 transitions. [2022-07-21 16:55:49,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 371 transitions. [2022-07-21 16:55:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 16:55:49,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:49,101 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:49,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:49,319 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2139029910, now seen corresponding path program 1 times [2022-07-21 16:55:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:49,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38876313] [2022-07-21 16:55:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:55:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38876313] [2022-07-21 16:55:49,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38876313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474410298] [2022-07-21 16:55:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:49,624 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:49,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:55:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:49,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 16:55:49,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:49,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:49,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:49,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:49,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:50,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:55:50,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:55:50,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:50,032 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:55:50,037 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:55:50,043 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int)) (v_ArrVal_767 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_766) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:55:50,049 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:55:50,061 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_767) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:55:50,068 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:50,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:55:50,073 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:50,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:55:50,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 11 not checked. [2022-07-21 16:55:50,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474410298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:50,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:50,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 33 [2022-07-21 16:55:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490436995] [2022-07-21 16:55:50,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:50,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 16:55:50,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 16:55:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=675, Unknown=5, NotChecked=280, Total=1056 [2022-07-21 16:55:50,229 INFO L87 Difference]: Start difference. First operand 329 states and 371 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:50,626 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-07-21 16:55:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:55:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-21 16:55:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:50,628 INFO L225 Difference]: With dead ends: 383 [2022-07-21 16:55:50,628 INFO L226 Difference]: Without dead ends: 343 [2022-07-21 16:55:50,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1058, Unknown=5, NotChecked=350, Total=1560 [2022-07-21 16:55:50,628 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 86 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:50,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 816 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 562 Invalid, 0 Unknown, 527 Unchecked, 0.2s Time] [2022-07-21 16:55:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-21 16:55:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2022-07-21 16:55:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 321 states have (on average 1.1214953271028036) internal successors, (360), 323 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 360 transitions. [2022-07-21 16:55:50,633 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 360 transitions. Word has length 43 [2022-07-21 16:55:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:50,633 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 360 transitions. [2022-07-21 16:55:50,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 360 transitions. [2022-07-21 16:55:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 16:55:50,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:50,634 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:50,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:50,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:50,851 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2022-07-21 16:55:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:50,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395134186] [2022-07-21 16:55:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395134186] [2022-07-21 16:55:50,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395134186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046110327] [2022-07-21 16:55:50,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:55:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:50,996 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:50,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:55:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 16:55:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:51,086 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:51,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:51,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:51,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046110327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:51,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:51,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-07-21 16:55:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558273612] [2022-07-21 16:55:51,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:51,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:55:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:55:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:55:51,715 INFO L87 Difference]: Start difference. First operand 324 states and 360 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:52,743 INFO L93 Difference]: Finished difference Result 558 states and 603 transitions. [2022-07-21 16:55:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:55:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-21 16:55:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:52,744 INFO L225 Difference]: With dead ends: 558 [2022-07-21 16:55:52,745 INFO L226 Difference]: Without dead ends: 558 [2022-07-21 16:55:52,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 16:55:52,746 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 572 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:52,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 469 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:55:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-21 16:55:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 336. [2022-07-21 16:55:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 333 states have (on average 1.1261261261261262) internal successors, (375), 335 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 375 transitions. [2022-07-21 16:55:52,754 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 375 transitions. Word has length 44 [2022-07-21 16:55:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:52,754 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 375 transitions. [2022-07-21 16:55:52,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 375 transitions. [2022-07-21 16:55:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 16:55:52,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:52,756 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:52,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:52,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-21 16:55:52,973 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:52,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2022-07-21 16:55:52,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:52,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151602418] [2022-07-21 16:55:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:52,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151602418] [2022-07-21 16:55:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151602418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471693182] [2022-07-21 16:55:53,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:55:53,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:53,284 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:53,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:55:53,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:55:53,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-21 16:55:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:53,416 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:53,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:53,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:53,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:53,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:53,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:53,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:55:53,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:55:54,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-21 16:55:54,230 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-21 16:55:54,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 18 [2022-07-21 16:55:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:54,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:54,268 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0)) is different from false [2022-07-21 16:55:54,272 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0))) is different from false [2022-07-21 16:55:54,277 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:55:54,286 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int)) (v_ArrVal_859 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_858))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0) (= (select (select .cse0 |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)))) is different from false [2022-07-21 16:55:54,302 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_858 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)))) (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-21 16:55:54,312 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int)) (v_ArrVal_857 (Array Int Int)) (v_ArrVal_859 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_857))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0) (= (select (select (store .cse0 |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)))) is different from false [2022-07-21 16:55:54,322 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_859) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-21 16:55:54,333 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_858) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (forall ((v_ArrVal_859 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_859) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-21 16:55:54,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:54,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-07-21 16:55:54,357 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-21 16:55:54,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2022-07-21 16:55:54,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:54,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2022-07-21 16:55:54,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471693182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:54,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:54,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-07-21 16:55:54,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653901274] [2022-07-21 16:55:54,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:54,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 16:55:54,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 16:55:54,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1844, Unknown=8, NotChecked=744, Total=2756 [2022-07-21 16:55:54,718 INFO L87 Difference]: Start difference. First operand 336 states and 375 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:56,614 INFO L93 Difference]: Finished difference Result 522 states and 575 transitions. [2022-07-21 16:55:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:55:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-21 16:55:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:56,616 INFO L225 Difference]: With dead ends: 522 [2022-07-21 16:55:56,616 INFO L226 Difference]: Without dead ends: 468 [2022-07-21 16:55:56,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=637, Invalid=5087, Unknown=8, NotChecked=1240, Total=6972 [2022-07-21 16:55:56,617 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 356 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 996 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:56,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1136 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 936 Invalid, 0 Unknown, 996 Unchecked, 0.4s Time] [2022-07-21 16:55:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-21 16:55:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 427. [2022-07-21 16:55:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 424 states have (on average 1.1273584905660377) internal successors, (478), 426 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 478 transitions. [2022-07-21 16:55:56,623 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 478 transitions. Word has length 44 [2022-07-21 16:55:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:56,623 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 478 transitions. [2022-07-21 16:55:56,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 478 transitions. [2022-07-21 16:55:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 16:55:56,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:56,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:56,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 16:55:56,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-21 16:55:56,839 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2022-07-21 16:55:56,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:56,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876102127] [2022-07-21 16:55:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876102127] [2022-07-21 16:55:57,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876102127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084494353] [2022-07-21 16:55:57,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:57,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:57,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:57,013 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:57,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:55:57,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 16:55:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:57,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:57,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:57,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:57,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:55:57,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:55:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:57,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084494353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:57,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:57,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2022-07-21 16:55:57,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633079766] [2022-07-21 16:55:57,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:57,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 16:55:57,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 16:55:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-07-21 16:55:57,428 INFO L87 Difference]: Start difference. First operand 427 states and 478 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:57,987 INFO L93 Difference]: Finished difference Result 899 states and 971 transitions. [2022-07-21 16:55:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:55:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-21 16:55:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:57,992 INFO L225 Difference]: With dead ends: 899 [2022-07-21 16:55:57,992 INFO L226 Difference]: Without dead ends: 882 [2022-07-21 16:55:57,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 16:55:57,993 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 263 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:57,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1055 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 939 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-07-21 16:55:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-07-21 16:55:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 515. [2022-07-21 16:55:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 512 states have (on average 1.126953125) internal successors, (577), 514 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 577 transitions. [2022-07-21 16:55:58,001 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 577 transitions. Word has length 47 [2022-07-21 16:55:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:58,001 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 577 transitions. [2022-07-21 16:55:58,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 577 transitions. [2022-07-21 16:55:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:55:58,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:58,002 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:58,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-21 16:55:58,215 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:55:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2022-07-21 16:55:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:58,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332935623] [2022-07-21 16:55:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:58,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:58,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332935623] [2022-07-21 16:55:58,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332935623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033195166] [2022-07-21 16:55:58,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:55:58,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:58,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:58,372 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:58,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:55:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:58,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 16:55:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:58,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:58,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:58,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:59,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033195166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:59,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:59,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-07-21 16:55:59,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541848850] [2022-07-21 16:55:59,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:59,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:55:59,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:55:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:55:59,146 INFO L87 Difference]: Start difference. First operand 515 states and 577 transitions. Second operand has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:00,089 INFO L93 Difference]: Finished difference Result 558 states and 611 transitions. [2022-07-21 16:56:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:56:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 16:56:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:00,094 INFO L225 Difference]: With dead ends: 558 [2022-07-21 16:56:00,095 INFO L226 Difference]: Without dead ends: 558 [2022-07-21 16:56:00,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=642, Invalid=3018, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 16:56:00,096 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 420 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:00,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 792 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:56:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-21 16:56:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2022-07-21 16:56:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 517 states have (on average 1.125725338491296) internal successors, (582), 519 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 582 transitions. [2022-07-21 16:56:00,101 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 582 transitions. Word has length 48 [2022-07-21 16:56:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:00,102 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 582 transitions. [2022-07-21 16:56:00,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 582 transitions. [2022-07-21 16:56:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:56:00,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:00,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:00,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:00,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:00,320 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:56:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash 615332876, now seen corresponding path program 2 times [2022-07-21 16:56:00,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:00,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726093070] [2022-07-21 16:56:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:00,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726093070] [2022-07-21 16:56:00,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726093070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052233846] [2022-07-21 16:56:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:00,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:00,478 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:56:00,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:00,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 16:56:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:00,584 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:00,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:00,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:01,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052233846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:01,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:01,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-07-21 16:56:01,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656435460] [2022-07-21 16:56:01,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:01,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:56:01,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:56:01,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:56:01,233 INFO L87 Difference]: Start difference. First operand 520 states and 582 transitions. Second operand has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:03,342 INFO L93 Difference]: Finished difference Result 672 states and 729 transitions. [2022-07-21 16:56:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 16:56:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 16:56:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:03,344 INFO L225 Difference]: With dead ends: 672 [2022-07-21 16:56:03,344 INFO L226 Difference]: Without dead ends: 623 [2022-07-21 16:56:03,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1442, Invalid=5698, Unknown=0, NotChecked=0, Total=7140 [2022-07-21 16:56:03,344 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 968 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:03,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 554 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:56:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-21 16:56:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 531. [2022-07-21 16:56:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 528 states have (on average 1.1174242424242424) internal successors, (590), 530 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 590 transitions. [2022-07-21 16:56:03,352 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 590 transitions. Word has length 48 [2022-07-21 16:56:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:03,352 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 590 transitions. [2022-07-21 16:56:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 590 transitions. [2022-07-21 16:56:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:56:03,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:03,371 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:03,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 16:56:03,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 16:56:03,584 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:56:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2022-07-21 16:56:03,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:03,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73911708] [2022-07-21 16:56:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:03,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:03,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:03,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73911708] [2022-07-21 16:56:03,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73911708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:03,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017221723] [2022-07-21 16:56:03,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:03,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:03,745 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:03,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:56:03,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:56:03,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:03,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 16:56:03,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:03,863 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:03,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:04,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:04,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017221723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:04,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:04,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2022-07-21 16:56:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147019222] [2022-07-21 16:56:04,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:04,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 16:56:04,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 16:56:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 16:56:04,678 INFO L87 Difference]: Start difference. First operand 531 states and 590 transitions. Second operand has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:05,860 INFO L93 Difference]: Finished difference Result 963 states and 1037 transitions. [2022-07-21 16:56:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:56:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-21 16:56:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:05,863 INFO L225 Difference]: With dead ends: 963 [2022-07-21 16:56:05,863 INFO L226 Difference]: Without dead ends: 963 [2022-07-21 16:56:05,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=996, Invalid=4116, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 16:56:05,864 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 545 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:05,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 538 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:56:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-07-21 16:56:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 546. [2022-07-21 16:56:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 545 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 609 transitions. [2022-07-21 16:56:05,870 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 609 transitions. Word has length 51 [2022-07-21 16:56:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:05,871 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 609 transitions. [2022-07-21 16:56:05,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 609 transitions. [2022-07-21 16:56:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:56:05,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:05,872 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:05,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-21 16:56:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:06,083 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:56:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2022-07-21 16:56:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833385559] [2022-07-21 16:56:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:06,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:06,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833385559] [2022-07-21 16:56:06,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833385559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:06,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033051106] [2022-07-21 16:56:06,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:06,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:06,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:06,645 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:06,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 16:56:06,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 16:56:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:06,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:07,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:07,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:07,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:07,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:07,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:07,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:07,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:07,734 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:07,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 16:56:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:07,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:07,745 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:56:07,749 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:56:07,754 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (v_ArrVal_1099 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1099) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:56:07,763 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:56:07,768 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (v_ArrVal_1098 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:56:07,772 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:56:07,783 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1097) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:56:07,829 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| Int)) (or (not (<= |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| |c_ULTIMATE.start_cstrcat_~append#1.offset|)) (not (<= 0 |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1100) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| 4)) 0))) is different from false [2022-07-21 16:56:07,844 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1100 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107|) (not (<= 0 |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_107| 4)) 0))) is different from false [2022-07-21 16:56:07,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:07,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:56:07,866 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:07,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:56:07,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:56:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 38 not checked. [2022-07-21 16:56:08,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033051106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:08,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:08,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 22] total 64 [2022-07-21 16:56:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301439107] [2022-07-21 16:56:08,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:08,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-21 16:56:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-21 16:56:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2819, Unknown=9, NotChecked=1026, Total=4032 [2022-07-21 16:56:08,322 INFO L87 Difference]: Start difference. First operand 546 states and 609 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:09,768 INFO L93 Difference]: Finished difference Result 666 states and 736 transitions. [2022-07-21 16:56:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:56:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 16:56:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:09,770 INFO L225 Difference]: With dead ends: 666 [2022-07-21 16:56:09,770 INFO L226 Difference]: Without dead ends: 619 [2022-07-21 16:56:09,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 9 IntricatePredicates, 4 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=359, Invalid=5823, Unknown=16, NotChecked=1458, Total=7656 [2022-07-21 16:56:09,771 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 234 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1413 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:09,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2004 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1044 Invalid, 0 Unknown, 1413 Unchecked, 0.4s Time] [2022-07-21 16:56:09,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-07-21 16:56:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 601. [2022-07-21 16:56:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 598 states have (on average 1.120401337792642) internal successors, (670), 600 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 670 transitions. [2022-07-21 16:56:09,776 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 670 transitions. Word has length 52 [2022-07-21 16:56:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:09,776 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 670 transitions. [2022-07-21 16:56:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 670 transitions. [2022-07-21 16:56:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 16:56:09,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:09,777 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:09,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:09,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-21 16:56:09,994 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:56:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:09,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 3 times [2022-07-21 16:56:09,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:09,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534612664] [2022-07-21 16:56:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:09,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534612664] [2022-07-21 16:56:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534612664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:10,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394897865] [2022-07-21 16:56:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:10,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:10,194 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:10,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 16:56:10,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 16:56:10,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:10,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 16:56:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:10,340 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:10,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:10,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:56:11,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394897865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:11,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:11,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-21 16:56:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158880196] [2022-07-21 16:56:11,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:56:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:56:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:56:11,146 INFO L87 Difference]: Start difference. First operand 601 states and 670 transitions. Second operand has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:13,991 INFO L93 Difference]: Finished difference Result 913 states and 980 transitions. [2022-07-21 16:56:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 16:56:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-21 16:56:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:13,993 INFO L225 Difference]: With dead ends: 913 [2022-07-21 16:56:13,993 INFO L226 Difference]: Without dead ends: 821 [2022-07-21 16:56:13,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2093, Invalid=8827, Unknown=0, NotChecked=0, Total=10920 [2022-07-21 16:56:13,995 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 729 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:13,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 796 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:56:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-07-21 16:56:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 553. [2022-07-21 16:56:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.1090909090909091) internal successors, (610), 552 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 610 transitions. [2022-07-21 16:56:14,010 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 610 transitions. Word has length 53 [2022-07-21 16:56:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:14,010 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 610 transitions. [2022-07-21 16:56:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 610 transitions. [2022-07-21 16:56:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 16:56:14,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:14,011 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:14,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:14,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:14,228 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:56:14,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash 97693371, now seen corresponding path program 10 times [2022-07-21 16:56:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751457828] [2022-07-21 16:56:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:56:14,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751457828] [2022-07-21 16:56:14,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751457828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930245073] [2022-07-21 16:56:14,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:56:14,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:14,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:14,423 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 16:56:14,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:56:14,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 16:56:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:14,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 46 proven. 45 refuted. 22 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:56:27,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:28,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2022-07-21 16:56:28,520 INFO L356 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-07-21 16:56:28,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 170 treesize of output 144 [2022-07-21 16:56:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 70 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:29,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930245073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:29,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:29,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 31] total 70 [2022-07-21 16:56:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622596050] [2022-07-21 16:56:29,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:29,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-21 16:56:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-21 16:56:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=4211, Unknown=34, NotChecked=0, Total=4830 [2022-07-21 16:56:29,076 INFO L87 Difference]: Start difference. First operand 553 states and 610 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:04,984 INFO L93 Difference]: Finished difference Result 850 states and 934 transitions. [2022-07-21 16:57:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-21 16:57:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 16:57:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:04,997 INFO L225 Difference]: With dead ends: 850 [2022-07-21 16:57:04,997 INFO L226 Difference]: Without dead ends: 787 [2022-07-21 16:57:04,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4907 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=2010, Invalid=14687, Unknown=73, NotChecked=0, Total=16770 [2022-07-21 16:57:04,998 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 277 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:04,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 434 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 761 Invalid, 0 Unknown, 375 Unchecked, 0.3s Time] [2022-07-21 16:57:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-07-21 16:57:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 763. [2022-07-21 16:57:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 760 states have (on average 1.1105263157894736) internal successors, (844), 762 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 844 transitions. [2022-07-21 16:57:05,004 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 844 transitions. Word has length 54 [2022-07-21 16:57:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:05,004 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 844 transitions. [2022-07-21 16:57:05,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 844 transitions. [2022-07-21 16:57:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:57:05,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:05,005 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:05,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-21 16:57:05,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:05,206 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:05,206 INFO L85 PathProgramCache]: Analyzing trace with hash 126995243, now seen corresponding path program 9 times [2022-07-21 16:57:05,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:05,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360281461] [2022-07-21 16:57:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:05,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:05,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:05,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360281461] [2022-07-21 16:57:05,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360281461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:05,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322848826] [2022-07-21 16:57:05,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:05,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:05,378 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:05,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 16:57:05,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:57:05,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 16:57:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:05,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:06,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-21 16:57:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322848826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:06,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:06,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-21 16:57:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909622768] [2022-07-21 16:57:06,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:57:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:57:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:57:06,096 INFO L87 Difference]: Start difference. First operand 763 states and 844 transitions. Second operand has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:06,785 INFO L93 Difference]: Finished difference Result 985 states and 1079 transitions. [2022-07-21 16:57:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 16:57:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 16:57:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:06,787 INFO L225 Difference]: With dead ends: 985 [2022-07-21 16:57:06,787 INFO L226 Difference]: Without dead ends: 985 [2022-07-21 16:57:06,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=673, Invalid=2867, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 16:57:06,788 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 441 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:06,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 832 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:57:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-07-21 16:57:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 846. [2022-07-21 16:57:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 843 states have (on average 1.1233689205219455) internal successors, (947), 845 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 947 transitions. [2022-07-21 16:57:06,813 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 947 transitions. Word has length 56 [2022-07-21 16:57:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:06,813 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 947 transitions. [2022-07-21 16:57:06,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 947 transitions. [2022-07-21 16:57:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:57:06,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:06,815 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:06,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:07,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:07,027 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash -358114732, now seen corresponding path program 2 times [2022-07-21 16:57:07,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:07,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748790414] [2022-07-21 16:57:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:07,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:07,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748790414] [2022-07-21 16:57:07,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748790414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:07,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604847979] [2022-07-21 16:57:07,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:07,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:07,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:07,256 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:07,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 16:57:07,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:07,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 16:57:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:07,393 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:07,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:07,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:08,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604847979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:08,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:08,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-21 16:57:08,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395688139] [2022-07-21 16:57:08,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:08,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:57:08,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:57:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:57:08,257 INFO L87 Difference]: Start difference. First operand 846 states and 947 transitions. Second operand has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:10,285 INFO L93 Difference]: Finished difference Result 1151 states and 1254 transitions. [2022-07-21 16:57:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 16:57:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-21 16:57:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:10,288 INFO L225 Difference]: With dead ends: 1151 [2022-07-21 16:57:10,288 INFO L226 Difference]: Without dead ends: 1151 [2022-07-21 16:57:10,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1598, Invalid=6058, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 16:57:10,289 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 967 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:10,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 745 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:57:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-07-21 16:57:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 859. [2022-07-21 16:57:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 856 states have (on average 1.125) internal successors, (963), 858 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 963 transitions. [2022-07-21 16:57:10,297 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 963 transitions. Word has length 57 [2022-07-21 16:57:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:10,297 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 963 transitions. [2022-07-21 16:57:10,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 963 transitions. [2022-07-21 16:57:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 16:57:10,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:10,299 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:10,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-21 16:57:10,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-21 16:57:10,515 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash 244902880, now seen corresponding path program 2 times [2022-07-21 16:57:10,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:10,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017338571] [2022-07-21 16:57:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:57:10,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017338571] [2022-07-21 16:57:10,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017338571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734269964] [2022-07-21 16:57:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:10,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:10,940 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:10,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 16:57:11,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-21 16:57:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:11,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:11,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:11,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:11,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:11,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:11,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:11,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:57:11,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:57:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:11,541 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:57:11,545 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:11,550 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1368 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:11,554 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:11,559 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1367 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1367) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:11,564 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:11,568 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int)) (v_ArrVal_1366 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1366) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:11,572 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1369) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:11,583 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1369 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1369) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:57:11,588 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:11,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:11,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:11,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:11,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 39 not checked. [2022-07-21 16:57:11,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734269964] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:11,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:11,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 49 [2022-07-21 16:57:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940807124] [2022-07-21 16:57:11,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 16:57:11,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 16:57:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1450, Unknown=9, NotChecked=756, Total=2352 [2022-07-21 16:57:11,789 INFO L87 Difference]: Start difference. First operand 859 states and 963 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:12,789 INFO L93 Difference]: Finished difference Result 994 states and 1089 transitions. [2022-07-21 16:57:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:57:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-21 16:57:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:12,791 INFO L225 Difference]: With dead ends: 994 [2022-07-21 16:57:12,791 INFO L226 Difference]: Without dead ends: 946 [2022-07-21 16:57:12,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 91 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=2462, Unknown=9, NotChecked=972, Total=3660 [2022-07-21 16:57:12,792 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 151 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1072 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:12,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1720 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1479 Invalid, 0 Unknown, 1072 Unchecked, 0.5s Time] [2022-07-21 16:57:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-07-21 16:57:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 868. [2022-07-21 16:57:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 865 states have (on average 1.1132947976878613) internal successors, (963), 867 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 963 transitions. [2022-07-21 16:57:12,799 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 963 transitions. Word has length 59 [2022-07-21 16:57:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:12,799 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 963 transitions. [2022-07-21 16:57:12,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 963 transitions. [2022-07-21 16:57:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 16:57:12,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:12,801 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:12,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:13,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:13,015 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:13,016 INFO L85 PathProgramCache]: Analyzing trace with hash 102819635, now seen corresponding path program 10 times [2022-07-21 16:57:13,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:13,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413629631] [2022-07-21 16:57:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:13,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:13,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:13,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413629631] [2022-07-21 16:57:13,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413629631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433385974] [2022-07-21 16:57:13,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:57:13,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:13,504 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:13,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 16:57:13,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:57:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 16:57:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:13,631 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:13,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:13,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:13,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:57:13,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:14,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:14,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:14,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:14,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:14,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:14,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:14,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:57:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 37 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:14,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:26,858 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:26,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:57:26,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:26,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:57:26,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:57:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 24 proven. 74 refuted. 19 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:27,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433385974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:27,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:27,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 71 [2022-07-21 16:57:27,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051704100] [2022-07-21 16:57:27,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:27,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-21 16:57:27,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:27,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-21 16:57:27,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=4561, Unknown=72, NotChecked=0, Total=4970 [2022-07-21 16:57:27,530 INFO L87 Difference]: Start difference. First operand 868 states and 963 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:29,255 INFO L93 Difference]: Finished difference Result 991 states and 1102 transitions. [2022-07-21 16:57:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 16:57:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-21 16:57:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:29,257 INFO L225 Difference]: With dead ends: 991 [2022-07-21 16:57:29,257 INFO L226 Difference]: Without dead ends: 960 [2022-07-21 16:57:29,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=986, Invalid=10932, Unknown=72, NotChecked=0, Total=11990 [2022-07-21 16:57:29,258 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 273 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:29,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1567 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 734 Invalid, 0 Unknown, 259 Unchecked, 0.3s Time] [2022-07-21 16:57:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-07-21 16:57:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 941. [2022-07-21 16:57:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 938 states have (on average 1.1130063965884862) internal successors, (1044), 940 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1044 transitions. [2022-07-21 16:57:29,265 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1044 transitions. Word has length 60 [2022-07-21 16:57:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:29,265 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1044 transitions. [2022-07-21 16:57:29,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1044 transitions. [2022-07-21 16:57:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 16:57:29,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:29,266 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:29,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:29,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:29,484 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -845094975, now seen corresponding path program 11 times [2022-07-21 16:57:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895252122] [2022-07-21 16:57:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:29,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895252122] [2022-07-21 16:57:29,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895252122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789880179] [2022-07-21 16:57:29,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:29,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:29,725 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:29,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 16:57:29,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 16:57:29,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:29,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 16:57:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:29,861 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:29,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:30,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:30,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789880179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:30,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:30,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-07-21 16:57:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838003682] [2022-07-21 16:57:30,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:30,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:57:30,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:57:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 16:57:30,868 INFO L87 Difference]: Start difference. First operand 941 states and 1044 transitions. Second operand has 52 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:32,859 INFO L93 Difference]: Finished difference Result 1920 states and 2063 transitions. [2022-07-21 16:57:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 16:57:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 16:57:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:32,863 INFO L225 Difference]: With dead ends: 1920 [2022-07-21 16:57:32,863 INFO L226 Difference]: Without dead ends: 1920 [2022-07-21 16:57:32,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1872, Invalid=6318, Unknown=0, NotChecked=0, Total=8190 [2022-07-21 16:57:32,863 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 595 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:32,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 957 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 16:57:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2022-07-21 16:57:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 977. [2022-07-21 16:57:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 974 states have (on average 1.1190965092402465) internal successors, (1090), 976 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1090 transitions. [2022-07-21 16:57:32,880 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1090 transitions. Word has length 62 [2022-07-21 16:57:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:32,881 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1090 transitions. [2022-07-21 16:57:32,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.2941176470588234) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1090 transitions. [2022-07-21 16:57:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 16:57:32,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:32,882 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:32,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:33,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-21 16:57:33,100 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1739829774, now seen corresponding path program 4 times [2022-07-21 16:57:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:33,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106921728] [2022-07-21 16:57:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:33,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:33,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:33,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106921728] [2022-07-21 16:57:33,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106921728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:33,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788711736] [2022-07-21 16:57:33,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:57:33,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:33,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:33,319 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:33,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 16:57:33,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:57:33,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-21 16:57:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:33,482 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:33,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:33,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:33,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:57:33,886 INFO L356 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2022-07-21 16:57:33,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 16:57:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 16:57:34,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:34,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-21 16:57:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:35,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-21 16:57:35,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 16:57:35,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788711736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:35,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:35,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2022-07-21 16:57:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728449761] [2022-07-21 16:57:35,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:35,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:57:35,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:57:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 16:57:35,425 INFO L87 Difference]: Start difference. First operand 977 states and 1090 transitions. Second operand has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:39,225 INFO L93 Difference]: Finished difference Result 1182 states and 1292 transitions. [2022-07-21 16:57:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-21 16:57:39,226 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 16:57:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:39,228 INFO L225 Difference]: With dead ends: 1182 [2022-07-21 16:57:39,228 INFO L226 Difference]: Without dead ends: 1039 [2022-07-21 16:57:39,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1383, Invalid=14367, Unknown=0, NotChecked=0, Total=15750 [2022-07-21 16:57:39,229 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 204 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:39,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1073 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2387 Invalid, 0 Unknown, 432 Unchecked, 1.0s Time] [2022-07-21 16:57:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-07-21 16:57:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 948. [2022-07-21 16:57:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 945 states have (on average 1.1121693121693121) internal successors, (1051), 947 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1051 transitions. [2022-07-21 16:57:39,235 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1051 transitions. Word has length 62 [2022-07-21 16:57:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:39,235 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1051 transitions. [2022-07-21 16:57:39,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1051 transitions. [2022-07-21 16:57:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 16:57:39,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:39,237 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:39,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:39,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-21 16:57:39,451 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1394468106, now seen corresponding path program 11 times [2022-07-21 16:57:39,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:39,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482265249] [2022-07-21 16:57:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:39,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482265249] [2022-07-21 16:57:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482265249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022951151] [2022-07-21 16:57:39,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:39,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:39,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:39,680 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:39,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 16:57:39,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 16:57:39,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 16:57:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:40,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:40,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-21 16:57:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:40,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022951151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:40,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:40,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-07-21 16:57:40,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456315873] [2022-07-21 16:57:40,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:40,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:57:40,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:57:40,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:57:40,619 INFO L87 Difference]: Start difference. First operand 948 states and 1051 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:41,592 INFO L93 Difference]: Finished difference Result 1259 states and 1380 transitions. [2022-07-21 16:57:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 16:57:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 16:57:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:41,595 INFO L225 Difference]: With dead ends: 1259 [2022-07-21 16:57:41,595 INFO L226 Difference]: Without dead ends: 1259 [2022-07-21 16:57:41,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=872, Invalid=3820, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 16:57:41,596 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 600 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:41,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1503 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:57:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-07-21 16:57:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1087. [2022-07-21 16:57:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1084 states have (on average 1.1208487084870848) internal successors, (1215), 1086 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1215 transitions. [2022-07-21 16:57:41,604 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1215 transitions. Word has length 64 [2022-07-21 16:57:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:41,604 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1215 transitions. [2022-07-21 16:57:41,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1215 transitions. [2022-07-21 16:57:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 16:57:41,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:41,606 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:41,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:41,823 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash 828941765, now seen corresponding path program 3 times [2022-07-21 16:57:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:41,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644143939] [2022-07-21 16:57:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:41,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:57:42,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:42,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644143939] [2022-07-21 16:57:42,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644143939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:42,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520565799] [2022-07-21 16:57:42,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:42,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:42,311 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) [2022-07-21 16:57:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 16:57:42,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:57:42,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 118 conjunts are in the unsatisfiable core [2022-07-21 16:57:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:42,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:42,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:42,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:42,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:42,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:43,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:43,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:43,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:57:43,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:57:43,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:43,149 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:57:43,153 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:43,158 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int)) (v_ArrVal_1690 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1690) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:43,163 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,170 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1689 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1689) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-21 16:57:43,175 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,180 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1688) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,185 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,190 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1687 (Array Int Int)) (v_ArrVal_1691 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1687) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,208 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1691) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,219 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1691 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1691) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:57:43,224 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:43,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:43,229 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:43,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:43,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 59 not checked. [2022-07-21 16:57:43,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520565799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:43,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:43,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 59 [2022-07-21 16:57:43,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886081077] [2022-07-21 16:57:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:43,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 16:57:43,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 16:57:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2122, Unknown=11, NotChecked=1122, Total=3422 [2022-07-21 16:57:43,494 INFO L87 Difference]: Start difference. First operand 1087 states and 1215 transitions. Second operand has 59 states, 59 states have (on average 2.542372881355932) internal successors, (150), 59 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:44,863 INFO L93 Difference]: Finished difference Result 1253 states and 1370 transitions. [2022-07-21 16:57:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:57:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.542372881355932) internal successors, (150), 59 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-21 16:57:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:44,865 INFO L225 Difference]: With dead ends: 1253 [2022-07-21 16:57:44,865 INFO L226 Difference]: Without dead ends: 1148 [2022-07-21 16:57:44,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 100 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 11 IntricatePredicates, 3 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=3790, Unknown=11, NotChecked=1474, Total=5550 [2022-07-21 16:57:44,866 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 193 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1567 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:44,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2286 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2190 Invalid, 0 Unknown, 1567 Unchecked, 0.7s Time] [2022-07-21 16:57:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-07-21 16:57:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1032. [2022-07-21 16:57:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1029 states have (on average 1.1098153547133138) internal successors, (1142), 1031 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1142 transitions. [2022-07-21 16:57:44,874 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1142 transitions. Word has length 67 [2022-07-21 16:57:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:44,874 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1142 transitions. [2022-07-21 16:57:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.542372881355932) internal successors, (150), 59 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1142 transitions. [2022-07-21 16:57:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 16:57:44,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:44,876 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:44,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:45,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:45,078 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:45,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2066697040, now seen corresponding path program 5 times [2022-07-21 16:57:45,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:45,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222976095] [2022-07-21 16:57:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:45,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:45,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222976095] [2022-07-21 16:57:45,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222976095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070394946] [2022-07-21 16:57:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:45,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:45,314 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) [2022-07-21 16:57:45,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 16:57:45,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 16:57:45,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 16:57:45,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:45,475 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:45,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:45,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 66 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:57:46,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070394946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:46,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:46,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 55 [2022-07-21 16:57:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658943619] [2022-07-21 16:57:46,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 16:57:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 16:57:46,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2746, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 16:57:46,664 INFO L87 Difference]: Start difference. First operand 1032 states and 1142 transitions. Second operand has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:51,088 INFO L93 Difference]: Finished difference Result 1750 states and 1868 transitions. [2022-07-21 16:57:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 16:57:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-21 16:57:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:51,091 INFO L225 Difference]: With dead ends: 1750 [2022-07-21 16:57:51,091 INFO L226 Difference]: Without dead ends: 1636 [2022-07-21 16:57:51,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3303, Invalid=14787, Unknown=0, NotChecked=0, Total=18090 [2022-07-21 16:57:51,092 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1164 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 4021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:51,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1558 Invalid, 4021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-21 16:57:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-07-21 16:57:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 973. [2022-07-21 16:57:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 970 states have (on average 1.1020618556701032) internal successors, (1069), 972 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1069 transitions. [2022-07-21 16:57:51,101 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1069 transitions. Word has length 67 [2022-07-21 16:57:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:51,101 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1069 transitions. [2022-07-21 16:57:51,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1069 transitions. [2022-07-21 16:57:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:57:51,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:51,102 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:51,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-21 16:57:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:51,315 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1532583327, now seen corresponding path program 12 times [2022-07-21 16:57:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471029235] [2022-07-21 16:57:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471029235] [2022-07-21 16:57:51,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471029235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38816544] [2022-07-21 16:57:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:51,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:51,551 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) [2022-07-21 16:57:51,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 16:57:51,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-21 16:57:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 16:57:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:51,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:52,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:52,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:52,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:57:52,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:57:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:57:52,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38816544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:52,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:52,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 39 [2022-07-21 16:57:52,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739365898] [2022-07-21 16:57:52,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:57:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:57:52,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:57:52,213 INFO L87 Difference]: Start difference. First operand 973 states and 1069 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:53,390 INFO L93 Difference]: Finished difference Result 2220 states and 2365 transitions. [2022-07-21 16:57:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 16:57:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 16:57:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:53,394 INFO L225 Difference]: With dead ends: 2220 [2022-07-21 16:57:53,394 INFO L226 Difference]: Without dead ends: 2168 [2022-07-21 16:57:53,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=2955, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 16:57:53,395 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 541 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:53,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1911 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:57:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2022-07-21 16:57:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1131. [2022-07-21 16:57:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1128 states have (on average 1.1037234042553192) internal successors, (1245), 1130 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1245 transitions. [2022-07-21 16:57:53,405 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1245 transitions. Word has length 68 [2022-07-21 16:57:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:53,405 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1245 transitions. [2022-07-21 16:57:53,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1245 transitions. [2022-07-21 16:57:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:57:53,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:53,406 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:53,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-21 16:57:53,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-21 16:57:53,620 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -404858498, now seen corresponding path program 12 times [2022-07-21 16:57:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:53,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164683747] [2022-07-21 16:57:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:54,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:54,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164683747] [2022-07-21 16:57:54,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164683747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:54,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015748427] [2022-07-21 16:57:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:54,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:54,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:54,205 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) [2022-07-21 16:57:54,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 16:57:54,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 16:57:54,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:54,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 161 conjunts are in the unsatisfiable core [2022-07-21 16:57:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:54,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:54,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:54,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:55,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:55,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:55,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:55,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:55,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:55,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:57:55,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:55,726 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:55,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-21 16:57:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:55,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:55,736 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:57:55,740 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:55,745 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int)) (v_ArrVal_1870 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1870) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:57:55,750 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,754 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int)) (v_ArrVal_1869 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1869) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-21 16:57:55,759 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,763 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1868 (Array Int Int)) (v_ArrVal_1871 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1868) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,768 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,772 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1867 (Array Int Int)) (v_ArrVal_1871 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1867) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,777 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,781 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1866 (Array Int Int)) (v_ArrVal_1871 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1866) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,802 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1871) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,808 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1871) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:57:55,813 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:55,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:55,826 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:55,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:55,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 83 not checked. [2022-07-21 16:57:56,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015748427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:56,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:56,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 27, 27] total 79 [2022-07-21 16:57:56,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353889761] [2022-07-21 16:57:56,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:56,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-21 16:57:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-21 16:57:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4087, Unknown=13, NotChecked=1820, Total=6162 [2022-07-21 16:57:56,195 INFO L87 Difference]: Start difference. First operand 1131 states and 1245 transitions. Second operand has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:57,576 INFO L93 Difference]: Finished difference Result 1318 states and 1448 transitions. [2022-07-21 16:57:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 16:57:57,577 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 16:57:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:57,579 INFO L225 Difference]: With dead ends: 1318 [2022-07-21 16:57:57,579 INFO L226 Difference]: Without dead ends: 1227 [2022-07-21 16:57:57,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 13 IntricatePredicates, 5 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=395, Invalid=7300, Unknown=13, NotChecked=2392, Total=10100 [2022-07-21 16:57:57,580 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 183 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1505 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:57,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 2092 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1154 Invalid, 0 Unknown, 1505 Unchecked, 0.4s Time] [2022-07-21 16:57:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-07-21 16:57:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1213. [2022-07-21 16:57:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1210 states have (on average 1.1041322314049586) internal successors, (1336), 1212 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1336 transitions. [2022-07-21 16:57:57,586 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1336 transitions. Word has length 68 [2022-07-21 16:57:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:57,587 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1336 transitions. [2022-07-21 16:57:57,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1336 transitions. [2022-07-21 16:57:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 16:57:57,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:57,588 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:57,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:57,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-21 16:57:57,803 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:57:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1922758244, now seen corresponding path program 13 times [2022-07-21 16:57:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:57,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602266033] [2022-07-21 16:57:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:57,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:58,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602266033] [2022-07-21 16:57:58,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602266033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:58,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239452523] [2022-07-21 16:57:58,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:57:58,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:58,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:58,082 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) [2022-07-21 16:57:58,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 16:57:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:57:58,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:58,226 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:58,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:58,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 120 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:59,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239452523] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:59,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:59,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 63 [2022-07-21 16:57:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948829268] [2022-07-21 16:57:59,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-21 16:57:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-21 16:57:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 16:57:59,629 INFO L87 Difference]: Start difference. First operand 1213 states and 1336 transitions. Second operand has 64 states, 63 states have (on average 3.253968253968254) internal successors, (205), 64 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:01,951 INFO L93 Difference]: Finished difference Result 2333 states and 2498 transitions. [2022-07-21 16:58:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:58:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.253968253968254) internal successors, (205), 64 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-21 16:58:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:01,956 INFO L225 Difference]: With dead ends: 2333 [2022-07-21 16:58:01,956 INFO L226 Difference]: Without dead ends: 2333 [2022-07-21 16:58:01,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1860, Invalid=8240, Unknown=0, NotChecked=0, Total=10100 [2022-07-21 16:58:01,957 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 625 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:01,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 1359 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3050 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 16:58:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-07-21 16:58:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1234. [2022-07-21 16:58:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1231 states have (on average 1.107229894394801) internal successors, (1363), 1233 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1363 transitions. [2022-07-21 16:58:01,967 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1363 transitions. Word has length 72 [2022-07-21 16:58:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:01,968 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1363 transitions. [2022-07-21 16:58:01,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.253968253968254) internal successors, (205), 64 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1363 transitions. [2022-07-21 16:58:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 16:58:01,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:01,969 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:01,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-21 16:58:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-21 16:58:02,169 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:58:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -807593407, now seen corresponding path program 13 times [2022-07-21 16:58:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:02,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973332529] [2022-07-21 16:58:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:02,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973332529] [2022-07-21 16:58:02,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973332529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449157645] [2022-07-21 16:58:02,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:58:02,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:02,480 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) [2022-07-21 16:58:02,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 16:58:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 16:58:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:02,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:58:02,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:03,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449157645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:03,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:03,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2022-07-21 16:58:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685582339] [2022-07-21 16:58:03,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:58:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:58:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 16:58:03,911 INFO L87 Difference]: Start difference. First operand 1234 states and 1363 transitions. Second operand has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:05,717 INFO L93 Difference]: Finished difference Result 1646 states and 1799 transitions. [2022-07-21 16:58:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 16:58:05,718 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-21 16:58:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:05,721 INFO L225 Difference]: With dead ends: 1646 [2022-07-21 16:58:05,721 INFO L226 Difference]: Without dead ends: 1646 [2022-07-21 16:58:05,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1566, Invalid=7176, Unknown=0, NotChecked=0, Total=8742 [2022-07-21 16:58:05,722 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 937 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:05,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1225 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:58:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-21 16:58:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1350. [2022-07-21 16:58:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1347 states have (on average 1.1202672605790647) internal successors, (1509), 1349 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1509 transitions. [2022-07-21 16:58:05,733 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1509 transitions. Word has length 72 [2022-07-21 16:58:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:05,733 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 1509 transitions. [2022-07-21 16:58:05,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1509 transitions. [2022-07-21 16:58:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 16:58:05,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:05,734 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:05,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-21 16:58:05,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:05,934 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:58:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 532989117, now seen corresponding path program 6 times [2022-07-21 16:58:05,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:05,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936169211] [2022-07-21 16:58:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:05,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:06,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936169211] [2022-07-21 16:58:06,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936169211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707724276] [2022-07-21 16:58:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:58:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:06,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:06,197 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) [2022-07-21 16:58:06,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 16:58:06,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 16:58:06,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-21 16:58:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:06,530 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:06,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:07,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 66 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:07,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707724276] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:07,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:07,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2022-07-21 16:58:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501178568] [2022-07-21 16:58:07,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:58:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:58:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 16:58:07,893 INFO L87 Difference]: Start difference. First operand 1350 states and 1509 transitions. Second operand has 57 states, 56 states have (on average 3.5) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:12,089 INFO L93 Difference]: Finished difference Result 1828 states and 1985 transitions. [2022-07-21 16:58:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-21 16:58:12,089 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.5) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-21 16:58:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:12,091 INFO L225 Difference]: With dead ends: 1828 [2022-07-21 16:58:12,091 INFO L226 Difference]: Without dead ends: 1828 [2022-07-21 16:58:12,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4497, Invalid=16383, Unknown=0, NotChecked=0, Total=20880 [2022-07-21 16:58:12,092 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1626 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:12,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1626 Valid, 1201 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2958 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 16:58:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-07-21 16:58:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1352. [2022-07-21 16:58:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1349 states have (on average 1.1215715344699777) internal successors, (1513), 1351 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1513 transitions. [2022-07-21 16:58:12,101 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1513 transitions. Word has length 72 [2022-07-21 16:58:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:12,102 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 1513 transitions. [2022-07-21 16:58:12,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.5) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1513 transitions. [2022-07-21 16:58:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 16:58:12,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:12,103 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:12,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-21 16:58:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:12,321 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:58:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1087961819, now seen corresponding path program 14 times [2022-07-21 16:58:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408785883] [2022-07-21 16:58:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 43 proven. 220 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:58:12,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408785883] [2022-07-21 16:58:12,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408785883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215543280] [2022-07-21 16:58:12,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:58:12,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:12,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:12,595 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) [2022-07-21 16:58:12,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 16:58:12,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:58:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 16:58:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:12,759 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:12,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:13,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:58:13,933 INFO L356 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2022-07-21 16:58:13,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-07-21 16:58:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 91 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:14,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:15,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-21 16:58:15,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:15,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-21 16:58:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 120 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:16,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215543280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:16,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:16,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2022-07-21 16:58:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647224163] [2022-07-21 16:58:16,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:16,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-21 16:58:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-21 16:58:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=6000, Unknown=0, NotChecked=0, Total=6480 [2022-07-21 16:58:16,172 INFO L87 Difference]: Start difference. First operand 1352 states and 1513 transitions. Second operand has 81 states, 81 states have (on average 2.7160493827160495) internal successors, (220), 81 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:19,896 INFO L93 Difference]: Finished difference Result 3034 states and 3272 transitions. [2022-07-21 16:58:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 16:58:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.7160493827160495) internal successors, (220), 81 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-21 16:58:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:19,899 INFO L225 Difference]: With dead ends: 3034 [2022-07-21 16:58:19,900 INFO L226 Difference]: Without dead ends: 3005 [2022-07-21 16:58:19,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1466, Invalid=14034, Unknown=0, NotChecked=0, Total=15500 [2022-07-21 16:58:19,901 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1191 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 4043 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 5021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 4043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 766 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:19,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 2010 Invalid, 5021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 4043 Invalid, 0 Unknown, 766 Unchecked, 1.5s Time] [2022-07-21 16:58:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2022-07-21 16:58:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 1635. [2022-07-21 16:58:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1632 states have (on average 1.1286764705882353) internal successors, (1842), 1634 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 1842 transitions. [2022-07-21 16:58:19,914 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 1842 transitions. Word has length 75 [2022-07-21 16:58:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 1842 transitions. [2022-07-21 16:58:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.7160493827160495) internal successors, (220), 81 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 1842 transitions. [2022-07-21 16:58:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 16:58:19,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:19,915 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:19,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:20,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-21 16:58:20,116 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:58:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash -215271382, now seen corresponding path program 4 times [2022-07-21 16:58:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:20,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996996406] [2022-07-21 16:58:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:58:20,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996996406] [2022-07-21 16:58:20,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996996406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27713197] [2022-07-21 16:58:20,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:58:20,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:20,701 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) [2022-07-21 16:58:20,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 16:58:20,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:58:20,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-21 16:58:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:20,869 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:20,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:20,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:21,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:21,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:21,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:25,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:25,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:26,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:34,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:37,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:37,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:37,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-21 16:58:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 105 refuted. 7 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:58:37,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:01,264 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:01,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:59:01,270 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:01,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:59:01,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:59:02,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 39 proven. 91 refuted. 34 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:59:02,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27713197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:02,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:02,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 79 [2022-07-21 16:59:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307998] [2022-07-21 16:59:02,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-21 16:59:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-21 16:59:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=5647, Unknown=104, NotChecked=0, Total=6162 [2022-07-21 16:59:02,176 INFO L87 Difference]: Start difference. First operand 1635 states and 1842 transitions. Second operand has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:20,218 INFO L93 Difference]: Finished difference Result 1868 states and 2085 transitions. [2022-07-21 16:59:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 16:59:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-21 16:59:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:20,220 INFO L225 Difference]: With dead ends: 1868 [2022-07-21 16:59:20,220 INFO L226 Difference]: Without dead ends: 1781 [2022-07-21 16:59:20,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2935 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=1136, Invalid=13274, Unknown=110, NotChecked=0, Total=14520 [2022-07-21 16:59:20,221 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 336 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1254 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:20,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 2328 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1418 Invalid, 0 Unknown, 1254 Unchecked, 0.5s Time] [2022-07-21 16:59:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-07-21 16:59:20,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1609. [2022-07-21 16:59:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1606 states have (on average 1.1164383561643836) internal successors, (1793), 1608 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 1793 transitions. [2022-07-21 16:59:20,232 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 1793 transitions. Word has length 75 [2022-07-21 16:59:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:20,232 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 1793 transitions. [2022-07-21 16:59:20,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 1793 transitions. [2022-07-21 16:59:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 16:59:20,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:20,234 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:20,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-21 16:59:20,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-21 16:59:20,447 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 191019849, now seen corresponding path program 14 times [2022-07-21 16:59:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118546090] [2022-07-21 16:59:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 19 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:21,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118546090] [2022-07-21 16:59:21,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118546090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604559879] [2022-07-21 16:59:21,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:59:21,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:21,429 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) [2022-07-21 16:59:21,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 16:59:21,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:59:21,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 150 conjunts are in the unsatisfiable core [2022-07-21 16:59:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:22,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:59:22,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:59:22,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-21 16:59:22,385 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-21 16:59:22,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-21 16:59:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:59:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:22,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2022-07-21 16:59:22,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-21 16:59:22,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:59:22,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:59:23,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:59:23,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:59:23,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:59:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:59:23,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:23,434 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:23,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-21 16:59:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:23,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:23,444 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:59:23,448 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:59:23,453 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2301 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2301) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-07-21 16:59:23,457 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,461 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2300 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2300) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,467 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,472 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2299 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2299) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,476 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-21 16:59:23,481 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2298 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2298) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,485 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-07-21 16:59:23,494 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,500 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-07-21 16:59:23,504 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0) (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-21 16:59:23,508 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2296 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2296) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0)) is different from false [2022-07-21 16:59:23,514 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_2302 (Array Int Int)) (v_ArrVal_2296 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2296) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2022-07-21 16:59:23,519 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-07-21 16:59:23,528 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2302) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-21 16:59:23,532 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2302) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2022-07-21 16:59:23,546 INFO L356 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2022-07-21 16:59:23,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2022-07-21 16:59:23,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:23,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:59:23,554 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:59:23,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-07-21 16:59:23,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:59:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 111 not checked. [2022-07-21 16:59:24,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604559879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:24,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:24,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 34] total 99 [2022-07-21 16:59:24,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98437277] [2022-07-21 16:59:24,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:24,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-21 16:59:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-21 16:59:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=6237, Unknown=18, NotChecked=3150, Total=9702 [2022-07-21 16:59:24,533 INFO L87 Difference]: Start difference. First operand 1609 states and 1793 transitions. Second operand has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 99 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:26,669 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (let ((.cse0 (not .cse3)) (.cse1 (<= 8 |c_ULTIMATE.start_main_~length1~0#1|)) (.cse2 (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0))) (and (or (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2302) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (or (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) .cse0) (or (and .cse1 (<= |c_ULTIMATE.start_main_~length1~0#1| 8) .cse2) .cse3) (or (and (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) .cse2) .cse3) (or (and .cse0 (= 8 |c_ULTIMATE.start_main_~length1~0#1|)) (= |c_ULTIMATE.start_main_~length1~0#1| 1) (and (= (+ |c_ULTIMATE.start_main_~length3~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) .cse3)) (or (and .cse1 .cse2 (<= |c_ULTIMATE.start_main_~i~0#1| 7)) .cse3)))) is different from false [2022-07-21 16:59:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:28,364 INFO L93 Difference]: Finished difference Result 1814 states and 2017 transitions. [2022-07-21 16:59:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 16:59:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 99 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-21 16:59:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:28,367 INFO L225 Difference]: With dead ends: 1814 [2022-07-21 16:59:28,367 INFO L226 Difference]: Without dead ends: 1708 [2022-07-21 16:59:28,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 94 SyntacticMatches, 38 SemanticMatches, 135 ConstructedPredicates, 19 IntricatePredicates, 1 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=565, Invalid=13298, Unknown=19, NotChecked=4750, Total=18632 [2022-07-21 16:59:28,368 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 235 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 4659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2518 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:28,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1730 Invalid, 4659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2109 Invalid, 0 Unknown, 2518 Unchecked, 0.9s Time] [2022-07-21 16:59:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-07-21 16:59:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1700. [2022-07-21 16:59:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1697 states have (on average 1.116087212728344) internal successors, (1894), 1699 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 1894 transitions. [2022-07-21 16:59:28,379 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 1894 transitions. Word has length 76 [2022-07-21 16:59:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:28,380 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 1894 transitions. [2022-07-21 16:59:28,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.101010101010101) internal successors, (208), 99 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 1894 transitions. [2022-07-21 16:59:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 16:59:28,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:28,381 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:28,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-21 16:59:28,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:28,595 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1232398120, now seen corresponding path program 7 times [2022-07-21 16:59:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:28,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947301591] [2022-07-21 16:59:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947301591] [2022-07-21 16:59:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947301591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:28,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402193443] [2022-07-21 16:59:28,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:59:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:28,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:28,896 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) [2022-07-21 16:59:28,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 16:59:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 16:59:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:29,058 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:29,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:59:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 34 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:29,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:30,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402193443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:30,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:30,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2022-07-21 16:59:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246131859] [2022-07-21 16:59:30,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 16:59:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 16:59:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3507, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 16:59:30,494 INFO L87 Difference]: Start difference. First operand 1700 states and 1894 transitions. Second operand has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:36,073 INFO L93 Difference]: Finished difference Result 2429 states and 2623 transitions. [2022-07-21 16:59:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-21 16:59:36,073 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-21 16:59:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:36,075 INFO L225 Difference]: With dead ends: 2429 [2022-07-21 16:59:36,075 INFO L226 Difference]: Without dead ends: 2269 [2022-07-21 16:59:36,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4968 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4609, Invalid=16853, Unknown=0, NotChecked=0, Total=21462 [2022-07-21 16:59:36,076 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1268 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 3889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:36,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 1459 Invalid, 3889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 3547 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 16:59:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-07-21 16:59:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1701. [2022-07-21 16:59:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1698 states have (on average 1.107773851590106) internal successors, (1881), 1700 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 1881 transitions. [2022-07-21 16:59:36,088 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 1881 transitions. Word has length 76 [2022-07-21 16:59:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:36,088 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 1881 transitions. [2022-07-21 16:59:36,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 1881 transitions. [2022-07-21 16:59:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:59:36,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:36,089 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:36,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:36,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:36,295 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1489111308, now seen corresponding path program 15 times [2022-07-21 16:59:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422141581] [2022-07-21 16:59:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat