./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrncat-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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:18:58,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:18:58,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:18:58,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:18:58,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:18:58,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:18:58,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:18:58,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:18:58,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:18:58,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:18:58,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:18:58,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:18:58,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:18:58,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:18:58,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:18:58,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:18:58,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:18:58,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:18:58,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:18:58,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:18:58,276 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:18:58,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:18:58,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:18:58,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:18:58,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:18:58,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:18:58,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:18:58,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:18:58,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:18:58,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:18:58,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:18:58,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:18:58,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:18:58,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:18:58,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:18:58,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:18:58,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:18:58,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:18:58,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:18:58,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:18:58,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:18:58,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:18:58,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:18:58,322 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:18:58,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:18:58,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:18:58,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:18:58,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:18:58,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:18:58,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:18:58,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:18:58,325 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:18:58,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:18:58,326 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:18:58,327 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:18:58,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:18:58,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:18:58,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:18:58,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:18:58,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:18:58,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:18:58,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:18:58,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:18:58,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:18:58,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:18:58,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:18:58,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:18:58,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2022-07-20 05:18:58,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:18:58,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:18:58,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:18:58,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:18:58,564 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:18:58,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-20 05:18:58,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4046832/14cb1182345142f4bc0706255a1573c9/FLAGe08d50b32 [2022-07-20 05:18:58,946 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:18:58,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-20 05:18:58,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4046832/14cb1182345142f4bc0706255a1573c9/FLAGe08d50b32 [2022-07-20 05:18:59,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b4046832/14cb1182345142f4bc0706255a1573c9 [2022-07-20 05:18:59,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:18:59,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:18:59,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:18:59,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:18:59,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:18:59,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff6aaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59, skipping insertion in model container [2022-07-20 05:18:59,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:18:59,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:18:59,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:18:59,672 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:18:59,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:18:59,730 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:18:59,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59 WrapperNode [2022-07-20 05:18:59,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:18:59,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:18:59,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:18:59,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:18:59,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,781 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2022-07-20 05:18:59,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:18:59,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:18:59,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:18:59,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:18:59,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:18:59,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:18:59,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:18:59,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:18:59,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (1/1) ... [2022-07-20 05:18:59,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:18:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:18:59,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 05:18:59,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 05:18:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:18:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:18:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:18:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:18:59,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:18:59,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:18:59,975 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:18:59,977 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:19:00,226 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:19:00,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:19:00,231 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 05:19:00,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:00 BoogieIcfgContainer [2022-07-20 05:19:00,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:19:00,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:19:00,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:19:00,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:19:00,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:18:59" (1/3) ... [2022-07-20 05:19:00,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de9a565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:00, skipping insertion in model container [2022-07-20 05:19:00,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:18:59" (2/3) ... [2022-07-20 05:19:00,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de9a565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:00, skipping insertion in model container [2022-07-20 05:19:00,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:00" (3/3) ... [2022-07-20 05:19:00,241 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2022-07-20 05:19:00,250 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:19:00,251 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-20 05:19:00,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:19:00,299 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@3983107f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fcf82a5 [2022-07-20 05:19:00,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-20 05:19:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:19:00,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:00,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:00,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2022-07-20 05:19:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:00,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719883536] [2022-07-20 05:19:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:00,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:00,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719883536] [2022-07-20 05:19:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719883536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:00,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:00,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:19:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405911383] [2022-07-20 05:19:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:00,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:19:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:19:00,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:00,470 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:00,521 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-20 05:19:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:19:00,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:19:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:00,528 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:19:00,529 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:19:00,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:00,539 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:00,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:19:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-20 05:19:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 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) [2022-07-20 05:19:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-20 05:19:00,563 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-20 05:19:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:00,563 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-20 05:19:00,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-20 05:19:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:19:00,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:00,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:19:00,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-20 05:19:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:00,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627123364] [2022-07-20 05:19:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627123364] [2022-07-20 05:19:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627123364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:00,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:00,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:19:00,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308856645] [2022-07-20 05:19:00,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:00,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:00,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:00,609 INFO L87 Difference]: Start difference. First operand 51 states and 59 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) [2022-07-20 05:19:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:00,676 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-20 05:19:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:00,676 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 [2022-07-20 05:19:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:00,677 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:19:00,677 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:19:00,678 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 [2022-07-20 05:19:00,679 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:00,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:19:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-20 05:19:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-20 05:19:00,683 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2022-07-20 05:19:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:00,683 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-20 05:19:00,683 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) [2022-07-20 05:19:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-20 05:19:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:19:00,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:00,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:00,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:19:00,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-20 05:19:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267759368] [2022-07-20 05:19:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:00,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:00,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267759368] [2022-07-20 05:19:00,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267759368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:00,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:00,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:19:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014929174] [2022-07-20 05:19:00,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:00,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:19:00,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:19:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:00,747 INFO L87 Difference]: Start difference. First operand 51 states and 58 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) [2022-07-20 05:19:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:00,771 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-07-20 05:19:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:19:00,772 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 [2022-07-20 05:19:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:00,772 INFO L225 Difference]: With dead ends: 49 [2022-07-20 05:19:00,772 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 05:19:00,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:00,774 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:00,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 05:19:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-20 05:19:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-20 05:19:00,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2022-07-20 05:19:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:00,778 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-20 05:19:00,778 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) [2022-07-20 05:19:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-20 05:19:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:19:00,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:00,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:19:00,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-20 05:19:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320299972] [2022-07-20 05:19:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:00,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:00,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320299972] [2022-07-20 05:19:00,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320299972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:00,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:00,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187537367] [2022-07-20 05:19:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:00,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:00,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:00,846 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.0) 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) [2022-07-20 05:19:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:00,947 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-07-20 05:19:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:00,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) 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 [2022-07-20 05:19:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:00,951 INFO L225 Difference]: With dead ends: 91 [2022-07-20 05:19:00,952 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:19:00,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:00,967 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:00,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:19:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-07-20 05:19:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 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) [2022-07-20 05:19:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-20 05:19:00,974 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2022-07-20 05:19:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:00,974 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-20 05:19:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) 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) [2022-07-20 05:19:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-20 05:19:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:19:00,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:00,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:19:00,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:00,978 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-20 05:19:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:00,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473165401] [2022-07-20 05:19:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:00,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:01,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473165401] [2022-07-20 05:19:01,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473165401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:01,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:01,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854574893] [2022-07-20 05:19:01,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:01,053 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:01,098 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-20 05:19:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:19:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:01,102 INFO L225 Difference]: With dead ends: 50 [2022-07-20 05:19:01,102 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 05:19:01,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:01,106 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:01,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 37 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 05:19:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-20 05:19:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-20 05:19:01,117 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2022-07-20 05:19:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:01,117 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-20 05:19:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-20 05:19:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:19:01,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:01,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:01,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:19:01,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2022-07-20 05:19:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:01,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628409137] [2022-07-20 05:19:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:01,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628409137] [2022-07-20 05:19:01,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628409137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:01,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:01,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058666846] [2022-07-20 05:19:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:01,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:01,175 INFO L87 Difference]: Start difference. First operand 50 states and 58 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) [2022-07-20 05:19:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:01,192 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2022-07-20 05:19:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:01,192 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 [2022-07-20 05:19:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:01,193 INFO L225 Difference]: With dead ends: 91 [2022-07-20 05:19:01,193 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:19:01,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:01,194 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:01,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:19:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2022-07-20 05:19:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-20 05:19:01,197 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2022-07-20 05:19:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:01,197 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-20 05:19:01,197 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) [2022-07-20 05:19:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-20 05:19:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:19:01,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:01,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:01,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:19:01,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2022-07-20 05:19:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:01,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416368766] [2022-07-20 05:19:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416368766] [2022-07-20 05:19:01,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416368766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:01,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:01,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:19:01,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61409313] [2022-07-20 05:19:01,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:01,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:01,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:01,238 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:01,309 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2022-07-20 05:19:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:19:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:19:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:01,311 INFO L225 Difference]: With dead ends: 129 [2022-07-20 05:19:01,312 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 05:19:01,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:01,315 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:01,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 05:19:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 60. [2022-07-20 05:19:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-20 05:19:01,322 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2022-07-20 05:19:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:01,322 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-20 05:19:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-20 05:19:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:19:01,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:01,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:19:01,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2022-07-20 05:19:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:01,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326726280] [2022-07-20 05:19:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:01,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326726280] [2022-07-20 05:19:01,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326726280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:01,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:01,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:19:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208265981] [2022-07-20 05:19:01,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:19:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:19:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:01,371 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:01,389 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-07-20 05:19:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:19:01,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 05:19:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:01,390 INFO L225 Difference]: With dead ends: 58 [2022-07-20 05:19:01,390 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 05:19:01,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:19:01,391 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:01,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 05:19:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-20 05:19:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 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) [2022-07-20 05:19:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-07-20 05:19:01,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 11 [2022-07-20 05:19:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:01,400 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-07-20 05:19:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-07-20 05:19:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:19:01,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:01,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:19:01,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:01,403 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2022-07-20 05:19:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:01,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288387035] [2022-07-20 05:19:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:01,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288387035] [2022-07-20 05:19:01,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288387035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:01,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:01,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2520846] [2022-07-20 05:19:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:01,435 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:01,458 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-07-20 05:19:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2022-07-20 05:19:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:01,459 INFO L225 Difference]: With dead ends: 57 [2022-07-20 05:19:01,459 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 05:19:01,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:01,461 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:01,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 05:19:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-20 05:19:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) 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) [2022-07-20 05:19:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-20 05:19:01,467 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2022-07-20 05:19:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:01,467 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-20 05:19:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-20 05:19:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:19:01,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:01,470 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 05:19:01,470 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-20 05:19:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:01,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330117077] [2022-07-20 05:19:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330117077] [2022-07-20 05:19:01,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330117077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340777864] [2022-07-20 05:19:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:01,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:01,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:01,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:19:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:19:01,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:01,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:01,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:01,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:01,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340777864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:01,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:01,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-07-20 05:19:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113279307] [2022-07-20 05:19:01,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:19:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:19:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:19:01,865 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:02,026 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-07-20 05:19:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:19:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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 12 [2022-07-20 05:19:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:02,028 INFO L225 Difference]: With dead ends: 128 [2022-07-20 05:19:02,028 INFO L226 Difference]: Without dead ends: 128 [2022-07-20 05:19:02,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:19:02,028 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 162 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:02,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 285 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-20 05:19:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2022-07-20 05:19:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-07-20 05:19:02,031 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2022-07-20 05:19:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:02,031 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-07-20 05:19:02,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-07-20 05:19:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:19:02,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:02,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:02,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:02,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 05:19:02,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:02,251 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2022-07-20 05:19:02,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:02,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605200839] [2022-07-20 05:19:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605200839] [2022-07-20 05:19:02,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605200839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:02,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:02,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626793563] [2022-07-20 05:19:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:02,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:02,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:02,294 INFO L87 Difference]: Start difference. First operand 53 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) [2022-07-20 05:19:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:02,328 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-07-20 05:19:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:02,328 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 [2022-07-20 05:19:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:02,329 INFO L225 Difference]: With dead ends: 49 [2022-07-20 05:19:02,329 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 05:19:02,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:02,330 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:02,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 05:19:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-20 05:19:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) 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) [2022-07-20 05:19:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-20 05:19:02,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2022-07-20 05:19:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:02,332 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-20 05:19:02,333 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) [2022-07-20 05:19:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-20 05:19:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:19:02,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:02,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:02,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 05:19:02,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:02,334 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2022-07-20 05:19:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:02,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581353451] [2022-07-20 05:19:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:02,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:02,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581353451] [2022-07-20 05:19:02,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581353451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:02,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:02,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:19:02,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320186180] [2022-07-20 05:19:02,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:02,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:19:02,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:19:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:02,390 INFO L87 Difference]: Start difference. First operand 49 states and 59 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) [2022-07-20 05:19:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:02,456 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-07-20 05:19:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:19:02,456 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 [2022-07-20 05:19:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:02,457 INFO L225 Difference]: With dead ends: 72 [2022-07-20 05:19:02,457 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 05:19:02,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:02,458 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:02,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 05:19:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-07-20 05:19:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-20 05:19:02,463 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2022-07-20 05:19:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:02,464 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-20 05:19:02,464 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) [2022-07-20 05:19:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-20 05:19:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 05:19:02,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:02,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:02,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 05:19:02,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-07-20 05:19:02,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:02,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255043109] [2022-07-20 05:19:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:02,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:02,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:02,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255043109] [2022-07-20 05:19:02,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255043109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:02,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:02,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164829440] [2022-07-20 05:19:02,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:02,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:02,521 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:02,569 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-20 05:19:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:02,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:19:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:02,571 INFO L225 Difference]: With dead ends: 99 [2022-07-20 05:19:02,571 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 05:19:02,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:02,572 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:02,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 80 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 05:19:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2022-07-20 05:19:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.462962962962963) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-07-20 05:19:02,574 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 14 [2022-07-20 05:19:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:02,575 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-07-20 05:19:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-07-20 05:19:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:19:02,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:02,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:02,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 05:19:02,584 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2022-07-20 05:19:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:02,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317316391] [2022-07-20 05:19:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317316391] [2022-07-20 05:19:02,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317316391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:02,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358649786] [2022-07-20 05:19:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:02,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:02,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:02,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:19:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 05:19:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:02,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:02,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:02,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358649786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:02,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:02,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-20 05:19:02,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368835300] [2022-07-20 05:19:02,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:02,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 05:19:02,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 05:19:02,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:19:02,878 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:03,035 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-20 05:19:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:19:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 05:19:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:03,036 INFO L225 Difference]: With dead ends: 92 [2022-07-20 05:19:03,036 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 05:19:03,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:19:03,036 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 458 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:03,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 201 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 05:19:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-07-20 05:19:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 64 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2022-07-20 05:19:03,038 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 15 [2022-07-20 05:19:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:03,038 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2022-07-20 05:19:03,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2022-07-20 05:19:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:19:03,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:03,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:03,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:03,239 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,SelfDestructingSolverStorable13 [2022-07-20 05:19:03,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2022-07-20 05:19:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:03,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618714246] [2022-07-20 05:19:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618714246] [2022-07-20 05:19:03,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618714246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:03,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:03,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:19:03,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578034720] [2022-07-20 05:19:03,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:03,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:03,273 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-07-20 05:19:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:03,301 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-07-20 05:19:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:19:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 [2022-07-20 05:19:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:03,302 INFO L225 Difference]: With dead ends: 66 [2022-07-20 05:19:03,302 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 05:19:03,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:03,303 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:03,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 05:19:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-07-20 05:19:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-07-20 05:19:03,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 17 [2022-07-20 05:19:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:03,305 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-07-20 05:19:03,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-07-20 05:19:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-07-20 05:19:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:19:03,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:03,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 05:19:03,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2022-07-20 05:19:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:03,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34053980] [2022-07-20 05:19:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:03,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34053980] [2022-07-20 05:19:03,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34053980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:03,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:03,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:19:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27532363] [2022-07-20 05:19:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:03,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:19:03,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:03,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:19:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:03,361 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2022-07-20 05:19:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:03,412 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-07-20 05:19:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:19:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2022-07-20 05:19:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:03,413 INFO L225 Difference]: With dead ends: 87 [2022-07-20 05:19:03,413 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 05:19:03,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:03,413 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:03,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 84 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 05:19:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-07-20 05:19:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2022-07-20 05:19:03,415 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 17 [2022-07-20 05:19:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:03,416 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2022-07-20 05:19:03,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2022-07-20 05:19:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2022-07-20 05:19:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:19:03,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:03,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:03,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 05:19:03,417 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2022-07-20 05:19:03,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:03,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402922409] [2022-07-20 05:19:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:03,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:03,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:03,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402922409] [2022-07-20 05:19:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402922409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:03,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:03,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:19:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523443198] [2022-07-20 05:19:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:19:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:19:03,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:19:03,483 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-07-20 05:19:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:03,616 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2022-07-20 05:19:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:19:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 [2022-07-20 05:19:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:03,617 INFO L225 Difference]: With dead ends: 151 [2022-07-20 05:19:03,617 INFO L226 Difference]: Without dead ends: 151 [2022-07-20 05:19:03,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:19:03,618 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:03,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-20 05:19:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2022-07-20 05:19:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-07-20 05:19:03,620 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 17 [2022-07-20 05:19:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:03,620 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-07-20 05:19:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-07-20 05:19:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-07-20 05:19:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:19:03,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:03,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:03,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 05:19:03,621 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-20 05:19:03,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:03,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358329388] [2022-07-20 05:19:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:03,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:03,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:03,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358329388] [2022-07-20 05:19:03,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358329388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:03,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773578055] [2022-07-20 05:19:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:03,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:03,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:03,662 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:03,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:19:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:19:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:03,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:03,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773578055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:03,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:03,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-20 05:19:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498446578] [2022-07-20 05:19:03,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:19:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:19:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:19:03,796 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:03,948 INFO L93 Difference]: Finished difference Result 278 states and 358 transitions. [2022-07-20 05:19:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:19:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:19:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:03,950 INFO L225 Difference]: With dead ends: 278 [2022-07-20 05:19:03,950 INFO L226 Difference]: Without dead ends: 278 [2022-07-20 05:19:03,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:19:03,951 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 534 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:03,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 272 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-20 05:19:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 90. [2022-07-20 05:19:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.369047619047619) internal successors, (115), 89 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) [2022-07-20 05:19:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2022-07-20 05:19:03,954 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 18 [2022-07-20 05:19:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:03,954 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2022-07-20 05:19:03,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2022-07-20 05:19:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:19:03,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:03,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:03,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:04,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 05:19:04,172 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash -440236817, now seen corresponding path program 1 times [2022-07-20 05:19:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:04,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634660940] [2022-07-20 05:19:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634660940] [2022-07-20 05:19:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634660940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030183279] [2022-07-20 05:19:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:04,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:04,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:04,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:04,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:19:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:04,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 05:19:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:04,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:04,360 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 10 treesize of output 8 [2022-07-20 05:19:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:04,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:04,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030183279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:04,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:04,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-20 05:19:04,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028198124] [2022-07-20 05:19:04,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:04,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:19:04,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:19:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:19:04,585 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 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) [2022-07-20 05:19:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:04,918 INFO L93 Difference]: Finished difference Result 182 states and 231 transitions. [2022-07-20 05:19:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:19:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 05:19:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:04,919 INFO L225 Difference]: With dead ends: 182 [2022-07-20 05:19:04,919 INFO L226 Difference]: Without dead ends: 182 [2022-07-20 05:19:04,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:19:04,920 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 371 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:04,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 521 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:19:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-20 05:19:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 102. [2022-07-20 05:19:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 101 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) [2022-07-20 05:19:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2022-07-20 05:19:04,922 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 21 [2022-07-20 05:19:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:04,922 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2022-07-20 05:19:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 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) [2022-07-20 05:19:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2022-07-20 05:19:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:19:04,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:04,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:04,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:05,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:05,131 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2022-07-20 05:19:05,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937440213] [2022-07-20 05:19:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:05,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:05,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937440213] [2022-07-20 05:19:05,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937440213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:05,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:05,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:19:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071836973] [2022-07-20 05:19:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:05,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:19:05,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:05,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:19:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:19:05,160 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:05,184 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2022-07-20 05:19:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:19:05,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:19:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:05,185 INFO L225 Difference]: With dead ends: 108 [2022-07-20 05:19:05,185 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 05:19:05,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:19:05,185 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 05:19:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-07-20 05:19:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2022-07-20 05:19:05,188 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 22 [2022-07-20 05:19:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:05,188 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-07-20 05:19:05,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2022-07-20 05:19:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 05:19:05,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:05,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:05,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 05:19:05,189 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2022-07-20 05:19:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:05,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29422321] [2022-07-20 05:19:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:19:05,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:05,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29422321] [2022-07-20 05:19:05,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29422321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:05,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314555982] [2022-07-20 05:19:05,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:19:05,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:05,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:05,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:05,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:19:05,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:19:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:19:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:05,299 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:19:05,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:19:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:19:05,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:19:05,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314555982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:05,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:05,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-20 05:19:05,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050635110] [2022-07-20 05:19:05,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:05,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:19:05,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:19:05,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:19:05,473 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:05,588 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2022-07-20 05:19:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:19:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 05:19:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:05,589 INFO L225 Difference]: With dead ends: 200 [2022-07-20 05:19:05,590 INFO L226 Difference]: Without dead ends: 200 [2022-07-20 05:19:05,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:19:05,590 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 231 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:05,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 178 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-20 05:19:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2022-07-20 05:19:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 91 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) [2022-07-20 05:19:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2022-07-20 05:19:05,593 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 22 [2022-07-20 05:19:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:05,594 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2022-07-20 05:19:05,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2022-07-20 05:19:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:19:05,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:05,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:05,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:05,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:05,814 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2134181768, now seen corresponding path program 2 times [2022-07-20 05:19:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:05,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356677640] [2022-07-20 05:19:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:05,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:05,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356677640] [2022-07-20 05:19:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356677640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:05,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283874385] [2022-07-20 05:19:05,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:19:05,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:05,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:05,984 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:05,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:19:06,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:19:06,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-20 05:19:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:06,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:06,129 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 17 treesize of output 13 [2022-07-20 05:19:06,169 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 20 treesize of output 22 [2022-07-20 05:19:06,257 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 05:19:06,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-20 05:19:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:06,323 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_241) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:19:06,328 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:06,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:19:06,333 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:06,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:19:06,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:19:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:06,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283874385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:06,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:06,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-07-20 05:19:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123393144] [2022-07-20 05:19:06,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:06,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 05:19:06,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 05:19:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2022-07-20 05:19:06,447 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:06,792 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2022-07-20 05:19:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:19:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:19:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:06,794 INFO L225 Difference]: With dead ends: 187 [2022-07-20 05:19:06,794 INFO L226 Difference]: Without dead ends: 187 [2022-07-20 05:19:06,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=948, Unknown=1, NotChecked=64, Total=1190 [2022-07-20 05:19:06,795 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 143 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:06,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 664 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-07-20 05:19:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-20 05:19:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 103. [2022-07-20 05:19:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 102 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) [2022-07-20 05:19:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-07-20 05:19:06,797 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 23 [2022-07-20 05:19:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:06,797 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-07-20 05:19:06,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-07-20 05:19:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:19:06,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:06,798 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] [2022-07-20 05:19:06,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:07,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:07,007 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2022-07-20 05:19:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482074903] [2022-07-20 05:19:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:07,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482074903] [2022-07-20 05:19:07,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482074903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:07,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155730408] [2022-07-20 05:19:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:07,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:07,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:07,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:07,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:19:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:07,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:19:07,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155730408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:07,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:07,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-20 05:19:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296745012] [2022-07-20 05:19:07,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:19:07,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:19:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:19:07,180 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:07,218 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2022-07-20 05:19:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:19:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:19:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:07,219 INFO L225 Difference]: With dead ends: 205 [2022-07-20 05:19:07,219 INFO L226 Difference]: Without dead ends: 205 [2022-07-20 05:19:07,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:07,220 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:07,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-20 05:19:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2022-07-20 05:19:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 175 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2022-07-20 05:19:07,223 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 23 [2022-07-20 05:19:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:07,224 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2022-07-20 05:19:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2022-07-20 05:19:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:19:07,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:07,225 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] [2022-07-20 05:19:07,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:07,436 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2022-07-20 05:19:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113053399] [2022-07-20 05:19:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113053399] [2022-07-20 05:19:07,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113053399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:07,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:07,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:19:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090554701] [2022-07-20 05:19:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:07,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:19:07,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:19:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:19:07,514 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:07,612 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-07-20 05:19:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:19:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:19:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:07,613 INFO L225 Difference]: With dead ends: 260 [2022-07-20 05:19:07,613 INFO L226 Difference]: Without dead ends: 260 [2022-07-20 05:19:07,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:19:07,614 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:07,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-20 05:19:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2022-07-20 05:19:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2419354838709677) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2022-07-20 05:19:07,617 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2022-07-20 05:19:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:07,617 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2022-07-20 05:19:07,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2022-07-20 05:19:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:19:07,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:07,618 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] [2022-07-20 05:19:07,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 05:19:07,618 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2022-07-20 05:19:07,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:07,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103391384] [2022-07-20 05:19:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:07,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103391384] [2022-07-20 05:19:07,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103391384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:07,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:07,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:19:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071846060] [2022-07-20 05:19:07,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:07,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:19:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:19:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:19:07,697 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:07,810 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-07-20 05:19:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:19:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:19:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:07,811 INFO L225 Difference]: With dead ends: 223 [2022-07-20 05:19:07,811 INFO L226 Difference]: Without dead ends: 223 [2022-07-20 05:19:07,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:19:07,811 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:07,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 182 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-20 05:19:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2022-07-20 05:19:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 180 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) [2022-07-20 05:19:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2022-07-20 05:19:07,814 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2022-07-20 05:19:07,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:07,814 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2022-07-20 05:19:07,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2022-07-20 05:19:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:19:07,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:07,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:07,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 05:19:07,815 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2022-07-20 05:19:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:07,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087607761] [2022-07-20 05:19:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:07,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:07,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087607761] [2022-07-20 05:19:07,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087607761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:07,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:07,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:19:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182720482] [2022-07-20 05:19:07,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:07,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:19:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:19:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:19:07,850 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2022-07-20 05:19:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:07,864 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2022-07-20 05:19:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:19:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 05:19:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:07,865 INFO L225 Difference]: With dead ends: 180 [2022-07-20 05:19:07,865 INFO L226 Difference]: Without dead ends: 133 [2022-07-20 05:19:07,865 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 [2022-07-20 05:19:07,866 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:07,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:19:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-20 05:19:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-20 05:19:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.178294573643411) internal successors, (152), 132 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) [2022-07-20 05:19:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2022-07-20 05:19:07,868 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 25 [2022-07-20 05:19:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:07,868 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2022-07-20 05:19:07,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2022-07-20 05:19:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2022-07-20 05:19:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:19:07,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:07,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:07,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 05:19:07,869 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2022-07-20 05:19:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:07,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863892053] [2022-07-20 05:19:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:07,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863892053] [2022-07-20 05:19:07,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863892053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288029139] [2022-07-20 05:19:07,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:19:07,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:07,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:07,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:19:08,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:19:08,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 05:19:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:08,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:08,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:08,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:08,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:08,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288029139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:08,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:08,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-07-20 05:19:08,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53898205] [2022-07-20 05:19:08,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:08,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:19:08,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:19:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:19:08,420 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:08,817 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2022-07-20 05:19:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:19:08,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 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 27 [2022-07-20 05:19:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:08,818 INFO L225 Difference]: With dead ends: 208 [2022-07-20 05:19:08,818 INFO L226 Difference]: Without dead ends: 198 [2022-07-20 05:19:08,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:19:08,819 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 288 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:08,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 318 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:19:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-20 05:19:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-07-20 05:19:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-07-20 05:19:08,821 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 27 [2022-07-20 05:19:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:08,822 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-07-20 05:19:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-07-20 05:19:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:19:08,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:08,822 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] [2022-07-20 05:19:08,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 05:19:09,023 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2022-07-20 05:19:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:09,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522306250] [2022-07-20 05:19:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:09,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:09,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522306250] [2022-07-20 05:19:09,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522306250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:19:09,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:19:09,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:19:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102789334] [2022-07-20 05:19:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:19:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:19:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:19:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:19:09,105 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:09,219 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2022-07-20 05:19:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:19:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 05:19:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:09,220 INFO L225 Difference]: With dead ends: 218 [2022-07-20 05:19:09,220 INFO L226 Difference]: Without dead ends: 181 [2022-07-20 05:19:09,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:19:09,221 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:09,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-20 05:19:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2022-07-20 05:19:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.178082191780822) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2022-07-20 05:19:09,224 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 27 [2022-07-20 05:19:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:09,224 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2022-07-20 05:19:09,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2022-07-20 05:19:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:19:09,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:09,225 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 05:19:09,225 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2022-07-20 05:19:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:09,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180431500] [2022-07-20 05:19:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:09,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:09,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180431500] [2022-07-20 05:19:09,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180431500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:09,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190198072] [2022-07-20 05:19:09,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:19:09,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:09,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:09,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:09,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:19:09,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:19:09,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:19:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:09,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:09,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:09,571 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 17 treesize of output 13 [2022-07-20 05:19:09,620 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 20 treesize of output 22 [2022-07-20 05:19:09,811 INFO L356 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2022-07-20 05:19:09,812 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 20 [2022-07-20 05:19:09,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:19:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:09,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:10,041 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:10,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-07-20 05:19:10,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:10,051 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:10,051 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 65 treesize of output 75 [2022-07-20 05:19:10,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:10,057 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 23 treesize of output 15 [2022-07-20 05:19:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:10,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:10,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190198072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:10,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:10,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 34 [2022-07-20 05:19:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458971001] [2022-07-20 05:19:10,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:19:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:19:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=995, Unknown=1, NotChecked=0, Total=1122 [2022-07-20 05:19:10,360 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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) [2022-07-20 05:19:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:11,157 INFO L93 Difference]: Finished difference Result 278 states and 308 transitions. [2022-07-20 05:19:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:19:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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 29 [2022-07-20 05:19:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:11,158 INFO L225 Difference]: With dead ends: 278 [2022-07-20 05:19:11,158 INFO L226 Difference]: Without dead ends: 241 [2022-07-20 05:19:11,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=330, Invalid=2425, Unknown=1, NotChecked=0, Total=2756 [2022-07-20 05:19:11,159 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 163 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:11,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 720 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 560 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-07-20 05:19:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-20 05:19:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 173. [2022-07-20 05:19:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2022-07-20 05:19:11,162 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2022-07-20 05:19:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:11,162 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2022-07-20 05:19:11,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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) [2022-07-20 05:19:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2022-07-20 05:19:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 05:19:11,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:11,163 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, 1, 1, 1, 1] [2022-07-20 05:19:11,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:11,379 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,SelfDestructingSolverStorable28 [2022-07-20 05:19:11,380 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2022-07-20 05:19:11,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973601325] [2022-07-20 05:19:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:11,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973601325] [2022-07-20 05:19:11,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973601325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655334553] [2022-07-20 05:19:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:11,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:11,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:11,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:19:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:11,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 05:19:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:11,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:11,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-20 05:19:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:11,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655334553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:11,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:11,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-20 05:19:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095856515] [2022-07-20 05:19:11,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:19:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:19:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:19:11,749 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:11,994 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2022-07-20 05:19:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:19:11,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 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 31 [2022-07-20 05:19:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:11,995 INFO L225 Difference]: With dead ends: 212 [2022-07-20 05:19:11,995 INFO L226 Difference]: Without dead ends: 212 [2022-07-20 05:19:11,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:19:11,996 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 205 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:11,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 241 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:19:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-20 05:19:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-07-20 05:19:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-07-20 05:19:11,999 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2022-07-20 05:19:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:11,999 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-07-20 05:19:11,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-07-20 05:19:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:19:12,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:12,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:12,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:12,214 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2022-07-20 05:19:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864824318] [2022-07-20 05:19:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:12,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:12,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864824318] [2022-07-20 05:19:12,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864824318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:12,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674565713] [2022-07-20 05:19:12,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:19:12,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:12,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:12,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:12,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:19:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 05:19:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 05:19:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:12,433 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:19:12,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:19:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:12,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:13,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674565713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:13,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:13,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 15] total 38 [2022-07-20 05:19:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575421753] [2022-07-20 05:19:13,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:13,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 05:19:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 05:19:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:19:13,361 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:14,251 INFO L93 Difference]: Finished difference Result 279 states and 307 transitions. [2022-07-20 05:19:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:19:14,252 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 05:19:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:14,253 INFO L225 Difference]: With dead ends: 279 [2022-07-20 05:19:14,253 INFO L226 Difference]: Without dead ends: 269 [2022-07-20 05:19:14,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 05:19:14,254 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 183 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:14,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 943 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 517 Invalid, 0 Unknown, 380 Unchecked, 0.2s Time] [2022-07-20 05:19:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-20 05:19:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2022-07-20 05:19:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 211 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 239 transitions. [2022-07-20 05:19:14,257 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 239 transitions. Word has length 33 [2022-07-20 05:19:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:14,257 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 239 transitions. [2022-07-20 05:19:14,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 239 transitions. [2022-07-20 05:19:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 05:19:14,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:14,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:14,475 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,SelfDestructingSolverStorable30 [2022-07-20 05:19:14,475 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:14,475 INFO L85 PathProgramCache]: Analyzing trace with hash 407057716, now seen corresponding path program 6 times [2022-07-20 05:19:14,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:14,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814844113] [2022-07-20 05:19:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:14,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:14,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814844113] [2022-07-20 05:19:14,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814844113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:14,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855892833] [2022-07-20 05:19:14,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:19:14,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:14,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:14,656 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:14,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:19:14,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 05:19:14,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:14,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 05:19:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:14,774 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:19:14,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:19:15,153 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 17 treesize of output 13 [2022-07-20 05:19:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:15,258 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 27 treesize of output 26 [2022-07-20 05:19:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:16,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 14 [2022-07-20 05:19:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:16,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:16,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:16,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-07-20 05:19:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:17,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855892833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:17,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:17,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 16] total 42 [2022-07-20 05:19:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660308081] [2022-07-20 05:19:17,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:17,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:19:17,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:19:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 05:19:17,005 INFO L87 Difference]: Start difference. First operand 212 states and 239 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:18,749 INFO L93 Difference]: Finished difference Result 429 states and 469 transitions. [2022-07-20 05:19:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-20 05:19:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-20 05:19:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:18,751 INFO L225 Difference]: With dead ends: 429 [2022-07-20 05:19:18,751 INFO L226 Difference]: Without dead ends: 384 [2022-07-20 05:19:18,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=5539, Unknown=0, NotChecked=0, Total=6162 [2022-07-20 05:19:18,752 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 463 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:18,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 964 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 822 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-07-20 05:19:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-20 05:19:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 235. [2022-07-20 05:19:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.147186147186147) internal successors, (265), 234 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2022-07-20 05:19:18,756 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 35 [2022-07-20 05:19:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:18,756 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2022-07-20 05:19:18,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2022-07-20 05:19:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 05:19:18,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:18,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:18,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:18,967 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,SelfDestructingSolverStorable31 [2022-07-20 05:19:18,968 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2022-07-20 05:19:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:18,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289402125] [2022-07-20 05:19:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:19,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289402125] [2022-07-20 05:19:19,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289402125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:19,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082261732] [2022-07-20 05:19:19,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:19:19,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:19,213 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:19,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:19:19,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:19:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-20 05:19:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:19,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:19:19,575 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-20 05:19:19,575 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 [2022-07-20 05:19:19,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:19,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-20 05:19:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:19,819 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:19,820 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 29 treesize of output 23 [2022-07-20 05:19:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:19,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:20,597 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-20 05:19:20,597 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-20 05:19:20,605 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:20,606 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 49 treesize of output 51 [2022-07-20 05:19:20,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:19:20,624 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 6 treesize of output 4 [2022-07-20 05:19:20,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:20,641 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:20,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 71 [2022-07-20 05:19:20,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:19:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:20,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082261732] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:20,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:20,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2022-07-20 05:19:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499456052] [2022-07-20 05:19:20,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:20,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 05:19:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 05:19:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2208, Unknown=5, NotChecked=0, Total=2450 [2022-07-20 05:19:20,822 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:21,578 INFO L93 Difference]: Finished difference Result 266 states and 296 transitions. [2022-07-20 05:19:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 05:19:21,579 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 05:19:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:21,580 INFO L225 Difference]: With dead ends: 266 [2022-07-20 05:19:21,580 INFO L226 Difference]: Without dead ends: 254 [2022-07-20 05:19:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=502, Invalid=4463, Unknown=5, NotChecked=0, Total=4970 [2022-07-20 05:19:21,581 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:21,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 341 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 269 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-07-20 05:19:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-20 05:19:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 236. [2022-07-20 05:19:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.146551724137931) internal successors, (266), 235 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2022-07-20 05:19:21,584 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 37 [2022-07-20 05:19:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:21,584 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2022-07-20 05:19:21,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2022-07-20 05:19:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:19:21,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:21,584 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:21,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:21,785 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,SelfDestructingSolverStorable32 [2022-07-20 05:19:21,785 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 7 times [2022-07-20 05:19:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:21,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512949401] [2022-07-20 05:19:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:21,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:21,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:21,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512949401] [2022-07-20 05:19:21,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512949401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:21,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094509947] [2022-07-20 05:19:21,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:19:21,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:21,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:21,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:19:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:21,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 05:19:21,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:22,035 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:19:22,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:19:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:23,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094509947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:23,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:23,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2022-07-20 05:19:23,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179991928] [2022-07-20 05:19:23,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:23,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 05:19:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 05:19:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:19:23,069 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:24,444 INFO L93 Difference]: Finished difference Result 433 states and 470 transitions. [2022-07-20 05:19:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 05:19:24,444 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:19:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:24,445 INFO L225 Difference]: With dead ends: 433 [2022-07-20 05:19:24,445 INFO L226 Difference]: Without dead ends: 423 [2022-07-20 05:19:24,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 05:19:24,446 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 388 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:24,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1492 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1208 Invalid, 0 Unknown, 509 Unchecked, 0.4s Time] [2022-07-20 05:19:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-20 05:19:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2022-07-20 05:19:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.138996138996139) internal successors, (295), 262 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2022-07-20 05:19:24,450 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 39 [2022-07-20 05:19:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:24,451 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2022-07-20 05:19:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2022-07-20 05:19:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:19:24,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:24,451 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-20 05:19:24,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:24,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:24,663 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash -22467999, now seen corresponding path program 1 times [2022-07-20 05:19:24,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:24,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943182983] [2022-07-20 05:19:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:24,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:19:24,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:24,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943182983] [2022-07-20 05:19:24,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943182983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:24,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140141190] [2022-07-20 05:19:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:24,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:24,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:24,983 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:24,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:19:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:25,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 05:19:25,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:25,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:25,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:19:25,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:19:25,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:19:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:19:25,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:25,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-20 05:19:25,320 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-20 05:19:25,338 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:19:25,344 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:25,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:19:25,348 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:25,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:19:25,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:19:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-20 05:19:25,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140141190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:25,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:25,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 31 [2022-07-20 05:19:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124132767] [2022-07-20 05:19:25,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:19:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:19:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=648, Unknown=3, NotChecked=162, Total=930 [2022-07-20 05:19:25,494 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:25,984 INFO L93 Difference]: Finished difference Result 280 states and 311 transitions. [2022-07-20 05:19:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:19:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 05:19:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:25,985 INFO L225 Difference]: With dead ends: 280 [2022-07-20 05:19:25,985 INFO L226 Difference]: Without dead ends: 255 [2022-07-20 05:19:25,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1317, Unknown=3, NotChecked=234, Total=1806 [2022-07-20 05:19:25,987 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:25,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 334 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 377 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-07-20 05:19:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-20 05:19:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2022-07-20 05:19:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.1411290322580645) internal successors, (283), 251 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2022-07-20 05:19:25,992 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 39 [2022-07-20 05:19:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:25,992 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2022-07-20 05:19:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2022-07-20 05:19:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 05:19:25,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:25,993 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:26,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:26,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:26,207 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash 224138538, now seen corresponding path program 8 times [2022-07-20 05:19:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:26,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237491009] [2022-07-20 05:19:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:26,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:26,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237491009] [2022-07-20 05:19:26,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237491009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:26,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146372393] [2022-07-20 05:19:26,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:19:26,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:26,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:26,423 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:26,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:19:26,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:19:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 05:19:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:26,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:26,647 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 17 treesize of output 13 [2022-07-20 05:19:26,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:19:26,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:19:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:26,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:26,868 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_622) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:19:26,872 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:26,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:19:26,877 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:26,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:19:26,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:19:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:27,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146372393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:27,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:27,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 31 [2022-07-20 05:19:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576597525] [2022-07-20 05:19:27,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:27,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:19:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:19:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2022-07-20 05:19:27,053 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:27,599 INFO L93 Difference]: Finished difference Result 491 states and 536 transitions. [2022-07-20 05:19:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:19:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-20 05:19:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:27,601 INFO L225 Difference]: With dead ends: 491 [2022-07-20 05:19:27,601 INFO L226 Difference]: Without dead ends: 457 [2022-07-20 05:19:27,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1590, Unknown=1, NotChecked=82, Total=1892 [2022-07-20 05:19:27,602 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 304 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:27,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1138 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 828 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-07-20 05:19:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-20 05:19:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 277. [2022-07-20 05:19:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 273 states have (on average 1.1428571428571428) internal successors, (312), 276 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 312 transitions. [2022-07-20 05:19:27,607 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 312 transitions. Word has length 41 [2022-07-20 05:19:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:27,607 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 312 transitions. [2022-07-20 05:19:27,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 312 transitions. [2022-07-20 05:19:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 05:19:27,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:27,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:27,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-20 05:19:27,824 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2099498562, now seen corresponding path program 2 times [2022-07-20 05:19:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:27,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908813408] [2022-07-20 05:19:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:19:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908813408] [2022-07-20 05:19:28,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908813408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:28,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372315228] [2022-07-20 05:19:28,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:19:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:28,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:28,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:19:28,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:19:28,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 05:19:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:28,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:28,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:19:28,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:19:28,340 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:19:28,340 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 [2022-07-20 05:19:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:19:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:28,379 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|))) is different from false [2022-07-20 05:19:28,383 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-20 05:19:28,393 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:19:28,397 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:28,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:19:28,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:28,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:19:28,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:19:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2022-07-20 05:19:28,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372315228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:28,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:28,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-07-20 05:19:28,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123036939] [2022-07-20 05:19:28,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 05:19:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 05:19:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=708, Unknown=3, NotChecked=168, Total=992 [2022-07-20 05:19:28,504 INFO L87 Difference]: Start difference. First operand 277 states and 312 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:28,793 INFO L93 Difference]: Finished difference Result 474 states and 521 transitions. [2022-07-20 05:19:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:19:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-20 05:19:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:28,794 INFO L225 Difference]: With dead ends: 474 [2022-07-20 05:19:28,794 INFO L226 Difference]: Without dead ends: 367 [2022-07-20 05:19:28,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1212, Unknown=3, NotChecked=222, Total=1640 [2022-07-20 05:19:28,795 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:28,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 357 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 214 Unchecked, 0.1s Time] [2022-07-20 05:19:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-20 05:19:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 319. [2022-07-20 05:19:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 315 states have (on average 1.1365079365079365) internal successors, (358), 318 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 358 transitions. [2022-07-20 05:19:28,799 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 358 transitions. Word has length 43 [2022-07-20 05:19:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:28,799 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 358 transitions. [2022-07-20 05:19:28,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 358 transitions. [2022-07-20 05:19:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 05:19:28,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:28,800 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:28,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:29,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-20 05:19:29,015 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 9 times [2022-07-20 05:19:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:29,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482157134] [2022-07-20 05:19:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:29,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:29,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482157134] [2022-07-20 05:19:29,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482157134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:29,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575273315] [2022-07-20 05:19:29,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:19:29,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:29,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:29,168 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:29,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:19:29,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 05:19:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 05:19:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:19:29,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:29,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:29,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:30,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:30,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575273315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:30,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:30,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-07-20 05:19:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710569172] [2022-07-20 05:19:30,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:19:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:19:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:19:30,067 INFO L87 Difference]: Start difference. First operand 319 states and 358 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:19:31,058 INFO L93 Difference]: Finished difference Result 571 states and 623 transitions. [2022-07-20 05:19:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:19:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-20 05:19:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:19:31,060 INFO L225 Difference]: With dead ends: 571 [2022-07-20 05:19:31,060 INFO L226 Difference]: Without dead ends: 551 [2022-07-20 05:19:31,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:19:31,061 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 685 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:19:31,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 850 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:19:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-20 05:19:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 348. [2022-07-20 05:19:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.130813953488372) internal successors, (389), 347 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 389 transitions. [2022-07-20 05:19:31,065 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 389 transitions. Word has length 45 [2022-07-20 05:19:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:19:31,066 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 389 transitions. [2022-07-20 05:19:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:19:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 389 transitions. [2022-07-20 05:19:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 05:19:31,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:19:31,067 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:19:31,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:19:31,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-20 05:19:31,284 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:19:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:19:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160992, now seen corresponding path program 10 times [2022-07-20 05:19:31,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:19:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693326181] [2022-07-20 05:19:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:19:31,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:19:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:19:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:19:31,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:19:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693326181] [2022-07-20 05:19:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693326181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:19:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205087451] [2022-07-20 05:19:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:19:31,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:19:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:19:31,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:19:31,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:19:31,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:19:31,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:19:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-20 05:19:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:19:31,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:19:31,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:19:31,910 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 17 treesize of output 13 [2022-07-20 05:19:31,950 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 20 treesize of output 22 [2022-07-20 05:19:49,129 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:49,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:19:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 27 proven. 56 refuted. 11 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:49,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:19:49,628 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:49,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-20 05:19:49,639 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:19:49,639 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 36 treesize of output 36 [2022-07-20 05:19:49,642 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 9 treesize of output 7 [2022-07-20 05:19:50,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:19:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:19:50,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205087451] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:19:50,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:19:50,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-07-20 05:19:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74569755] [2022-07-20 05:19:50,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:19:50,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 05:19:50,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:19:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 05:19:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2505, Unknown=7, NotChecked=0, Total=2756 [2022-07-20 05:19:50,286 INFO L87 Difference]: Start difference. First operand 348 states and 389 transitions. Second operand has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:02,780 INFO L93 Difference]: Finished difference Result 730 states and 791 transitions. [2022-07-20 05:20:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 05:20:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:20:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:02,782 INFO L225 Difference]: With dead ends: 730 [2022-07-20 05:20:02,782 INFO L226 Difference]: Without dead ends: 660 [2022-07-20 05:20:02,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=561, Invalid=6071, Unknown=10, NotChecked=0, Total=6642 [2022-07-20 05:20:02,783 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 266 mSDsluCounter, 2177 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:02,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 2277 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1434 Invalid, 0 Unknown, 454 Unchecked, 0.6s Time] [2022-07-20 05:20:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-20 05:20:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 377. [2022-07-20 05:20:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 373 states have (on average 1.1313672922252012) internal successors, (422), 376 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 422 transitions. [2022-07-20 05:20:02,788 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 422 transitions. Word has length 47 [2022-07-20 05:20:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:02,788 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 422 transitions. [2022-07-20 05:20:02,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 422 transitions. [2022-07-20 05:20:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 05:20:02,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:02,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:02,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:03,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:03,007 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 599820123, now seen corresponding path program 3 times [2022-07-20 05:20:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802300859] [2022-07-20 05:20:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:03,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:03,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802300859] [2022-07-20 05:20:03,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802300859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:03,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080604989] [2022-07-20 05:20:03,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:03,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:03,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:03,125 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:03,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:20:03,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:20:03,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:20:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:03,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:03,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-20 05:20:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:03,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080604989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:03,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:03,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-20 05:20:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38025408] [2022-07-20 05:20:03,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:20:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:20:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:20:03,547 INFO L87 Difference]: Start difference. First operand 377 states and 422 transitions. Second operand has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 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) [2022-07-20 05:20:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:03,963 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2022-07-20 05:20:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:20:03,964 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 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) Word has length 47 [2022-07-20 05:20:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:03,965 INFO L225 Difference]: With dead ends: 501 [2022-07-20 05:20:03,965 INFO L226 Difference]: Without dead ends: 501 [2022-07-20 05:20:03,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:20:03,966 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 397 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:03,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 355 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:20:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-20 05:20:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2022-07-20 05:20:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.1233933161953729) internal successors, (437), 392 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 437 transitions. [2022-07-20 05:20:03,970 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 437 transitions. Word has length 47 [2022-07-20 05:20:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:03,970 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 437 transitions. [2022-07-20 05:20:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 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) [2022-07-20 05:20:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 437 transitions. [2022-07-20 05:20:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 05:20:03,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:03,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:03,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:04,187 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,SelfDestructingSolverStorable39 [2022-07-20 05:20:04,187 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1568194937, now seen corresponding path program 1 times [2022-07-20 05:20:04,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446868927] [2022-07-20 05:20:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:04,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:04,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446868927] [2022-07-20 05:20:04,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446868927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534999152] [2022-07-20 05:20:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:04,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:04,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:04,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:04,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:20:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 05:20:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:04,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:04,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:05,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534999152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:05,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:05,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-07-20 05:20:05,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582970417] [2022-07-20 05:20:05,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:05,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 05:20:05,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 05:20:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:20:05,295 INFO L87 Difference]: Start difference. First operand 393 states and 437 transitions. Second operand has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:06,946 INFO L93 Difference]: Finished difference Result 626 states and 683 transitions. [2022-07-20 05:20:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 05:20:06,946 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 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 50 [2022-07-20 05:20:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:06,947 INFO L225 Difference]: With dead ends: 626 [2022-07-20 05:20:06,947 INFO L226 Difference]: Without dead ends: 620 [2022-07-20 05:20:06,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=882, Invalid=3810, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 05:20:06,948 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 566 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:06,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 455 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:20:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-20 05:20:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 454. [2022-07-20 05:20:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 453 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 509 transitions. [2022-07-20 05:20:06,953 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 509 transitions. Word has length 50 [2022-07-20 05:20:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:06,953 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 509 transitions. [2022-07-20 05:20:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 509 transitions. [2022-07-20 05:20:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 05:20:06,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:06,954 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:06,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:07,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:07,167 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:07,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 11 times [2022-07-20 05:20:07,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:07,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716837610] [2022-07-20 05:20:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:07,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:07,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716837610] [2022-07-20 05:20:07,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716837610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246750896] [2022-07-20 05:20:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:20:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:07,382 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:07,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:20:07,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 05:20:07,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:20:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:07,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:07,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:07,491 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 [2022-07-20 05:20:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:07,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:08,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:08,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246750896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:08,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:08,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-07-20 05:20:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215326051] [2022-07-20 05:20:08,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:20:08,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:20:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:20:08,369 INFO L87 Difference]: Start difference. First operand 454 states and 509 transitions. Second operand has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 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) [2022-07-20 05:20:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:09,580 INFO L93 Difference]: Finished difference Result 904 states and 985 transitions. [2022-07-20 05:20:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:20:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 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 51 [2022-07-20 05:20:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:09,582 INFO L225 Difference]: With dead ends: 904 [2022-07-20 05:20:09,582 INFO L226 Difference]: Without dead ends: 884 [2022-07-20 05:20:09,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 05:20:09,583 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 615 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:09,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1632 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 05:20:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-20 05:20:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 504. [2022-07-20 05:20:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.124) internal successors, (562), 503 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2022-07-20 05:20:09,590 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 51 [2022-07-20 05:20:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:09,590 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2022-07-20 05:20:09,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 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) [2022-07-20 05:20:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2022-07-20 05:20:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 05:20:09,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:09,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:09,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:09,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:09,808 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash 620577460, now seen corresponding path program 3 times [2022-07-20 05:20:09,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:09,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573058752] [2022-07-20 05:20:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:10,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573058752] [2022-07-20 05:20:10,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573058752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562278219] [2022-07-20 05:20:10,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:10,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:10,345 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:10,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:20:10,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:20:10,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-20 05:20:10,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:10,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:10,958 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-20 05:20:10,959 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 [2022-07-20 05:20:10,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-20 05:20:10,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:10,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-20 05:20:11,253 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 [2022-07-20 05:20:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:11,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:11,398 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:11,398 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 [2022-07-20 05:20:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:11,412 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-20 05:20:11,417 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-20 05:20:11,481 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem5#1| 0)) is different from false [2022-07-20 05:20:11,488 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post4#1.base|) |c_ULTIMATE.start_cstrncat_#t~post4#1.offset|) 0)) is different from false [2022-07-20 05:20:11,493 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-20 05:20:11,654 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-20 05:20:11,654 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-20 05:20:11,663 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:11,663 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 49 treesize of output 51 [2022-07-20 05:20:11,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:20:11,690 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 6 treesize of output 4 [2022-07-20 05:20:11,714 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-20 05:20:11,715 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 61 treesize of output 71 [2022-07-20 05:20:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2022-07-20 05:20:12,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562278219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:12,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:12,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 57 [2022-07-20 05:20:12,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963283388] [2022-07-20 05:20:12,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:12,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 05:20:12,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 05:20:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2412, Unknown=6, NotChecked=520, Total=3192 [2022-07-20 05:20:12,133 INFO L87 Difference]: Start difference. First operand 504 states and 562 transitions. Second operand has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:13,002 INFO L93 Difference]: Finished difference Result 522 states and 579 transitions. [2022-07-20 05:20:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 05:20:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-20 05:20:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:13,003 INFO L225 Difference]: With dead ends: 522 [2022-07-20 05:20:13,003 INFO L226 Difference]: Without dead ends: 504 [2022-07-20 05:20:13,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=430, Invalid=3874, Unknown=6, NotChecked=660, Total=4970 [2022-07-20 05:20:13,004 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 98 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:13,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 443 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 362 Invalid, 0 Unknown, 541 Unchecked, 0.2s Time] [2022-07-20 05:20:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-20 05:20:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-07-20 05:20:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.122) internal successors, (561), 503 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 561 transitions. [2022-07-20 05:20:13,009 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 561 transitions. Word has length 51 [2022-07-20 05:20:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:13,009 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 561 transitions. [2022-07-20 05:20:13,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 561 transitions. [2022-07-20 05:20:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:20:13,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:13,010 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:13,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:13,227 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1125709994, now seen corresponding path program 12 times [2022-07-20 05:20:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88851748] [2022-07-20 05:20:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:13,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88851748] [2022-07-20 05:20:13,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88851748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018063341] [2022-07-20 05:20:13,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:20:13,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:13,499 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:20:13,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 05:20:13,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-20 05:20:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:13,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:13,844 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 17 treesize of output 13 [2022-07-20 05:20:13,881 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 20 treesize of output 22 [2022-07-20 05:20:14,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:20:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:14,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:14,061 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_980 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_980) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:20:14,065 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:14,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:20:14,070 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:14,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:20:14,074 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 11 treesize of output 7 [2022-07-20 05:20:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:14,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018063341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:14,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:14,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 37 [2022-07-20 05:20:14,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221936356] [2022-07-20 05:20:14,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:14,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:20:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:20:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1158, Unknown=1, NotChecked=68, Total=1332 [2022-07-20 05:20:14,297 INFO L87 Difference]: Start difference. First operand 504 states and 561 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:15,201 INFO L93 Difference]: Finished difference Result 1044 states and 1133 transitions. [2022-07-20 05:20:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:20:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 05:20:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:15,203 INFO L225 Difference]: With dead ends: 1044 [2022-07-20 05:20:15,203 INFO L226 Difference]: Without dead ends: 985 [2022-07-20 05:20:15,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1899, Unknown=1, NotChecked=88, Total=2162 [2022-07-20 05:20:15,204 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 252 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:15,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2598 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1809 Invalid, 0 Unknown, 371 Unchecked, 0.6s Time] [2022-07-20 05:20:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-07-20 05:20:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 537. [2022-07-20 05:20:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.125703564727955) internal successors, (600), 536 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 600 transitions. [2022-07-20 05:20:15,210 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 600 transitions. Word has length 53 [2022-07-20 05:20:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:15,210 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 600 transitions. [2022-07-20 05:20:15,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 600 transitions. [2022-07-20 05:20:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:20:15,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:15,211 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:15,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:15,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:15,428 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash -986319027, now seen corresponding path program 4 times [2022-07-20 05:20:15,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:15,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931436368] [2022-07-20 05:20:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:15,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:20:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:15,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931436368] [2022-07-20 05:20:15,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931436368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:15,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426790505] [2022-07-20 05:20:15,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:15,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:15,901 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:15,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:20:15,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:15,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 05:20:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:15,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:16,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:16,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:20:16,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:20:16,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:20:16,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:16,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:20:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:16,956 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:16,956 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 [2022-07-20 05:20:16,961 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:16,962 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 [2022-07-20 05:20:16,965 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 [2022-07-20 05:20:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:20:17,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426790505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:17,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:17,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 43 [2022-07-20 05:20:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601801575] [2022-07-20 05:20:17,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:20:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:20:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1638, Unknown=30, NotChecked=0, Total=1806 [2022-07-20 05:20:17,344 INFO L87 Difference]: Start difference. First operand 537 states and 600 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:18,215 INFO L93 Difference]: Finished difference Result 555 states and 617 transitions. [2022-07-20 05:20:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:20:18,215 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 05:20:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:18,216 INFO L225 Difference]: With dead ends: 555 [2022-07-20 05:20:18,217 INFO L226 Difference]: Without dead ends: 518 [2022-07-20 05:20:18,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=339, Invalid=3170, Unknown=31, NotChecked=0, Total=3540 [2022-07-20 05:20:18,217 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:18,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 449 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 402 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-07-20 05:20:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-20 05:20:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-07-20 05:20:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.1245136186770428) internal successors, (578), 517 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 578 transitions. [2022-07-20 05:20:18,222 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 578 transitions. Word has length 53 [2022-07-20 05:20:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:18,222 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 578 transitions. [2022-07-20 05:20:18,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 578 transitions. [2022-07-20 05:20:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 05:20:18,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:18,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:18,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:18,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 05:20:18,441 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash 796337809, now seen corresponding path program 4 times [2022-07-20 05:20:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630590977] [2022-07-20 05:20:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:18,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:18,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630590977] [2022-07-20 05:20:18,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630590977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:18,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951677164] [2022-07-20 05:20:18,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:18,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:18,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:18,776 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:18,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:20:18,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:18,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 05:20:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:18,882 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:18,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:20:18,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:19,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:20:19,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:20:19,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:20:19,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:19,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:20:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:19,680 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:19,681 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 [2022-07-20 05:20:19,685 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:19,686 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 [2022-07-20 05:20:19,688 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 [2022-07-20 05:20:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:20,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951677164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:20,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:20,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 45 [2022-07-20 05:20:20,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94575721] [2022-07-20 05:20:20,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:20,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 05:20:20,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 05:20:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1782, Unknown=39, NotChecked=0, Total=1980 [2022-07-20 05:20:20,132 INFO L87 Difference]: Start difference. First operand 518 states and 578 transitions. Second operand has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 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) [2022-07-20 05:20:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:21,086 INFO L93 Difference]: Finished difference Result 671 states and 739 transitions. [2022-07-20 05:20:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:20:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-20 05:20:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:21,088 INFO L225 Difference]: With dead ends: 671 [2022-07-20 05:20:21,088 INFO L226 Difference]: Without dead ends: 599 [2022-07-20 05:20:21,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=484, Invalid=4305, Unknown=41, NotChecked=0, Total=4830 [2022-07-20 05:20:21,089 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 142 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:21,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 509 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 516 Invalid, 0 Unknown, 270 Unchecked, 0.2s Time] [2022-07-20 05:20:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-20 05:20:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 563. [2022-07-20 05:20:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 559 states have (on average 1.1234347048300537) internal successors, (628), 562 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 628 transitions. [2022-07-20 05:20:21,094 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 628 transitions. Word has length 55 [2022-07-20 05:20:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:21,094 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 628 transitions. [2022-07-20 05:20:21,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 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) [2022-07-20 05:20:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 628 transitions. [2022-07-20 05:20:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 05:20:21,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:21,095 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:21,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:21,311 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,SelfDestructingSolverStorable45 [2022-07-20 05:20:21,311 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash 37563779, now seen corresponding path program 2 times [2022-07-20 05:20:21,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:21,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306531710] [2022-07-20 05:20:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:21,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306531710] [2022-07-20 05:20:21,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306531710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:21,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565780769] [2022-07-20 05:20:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:21,457 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:21,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:20:21,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:21,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 05:20:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:21,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:21,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:22,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:22,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565780769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:22,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:22,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2022-07-20 05:20:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648082122] [2022-07-20 05:20:22,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:22,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 05:20:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 05:20:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 05:20:22,543 INFO L87 Difference]: Start difference. First operand 563 states and 628 transitions. Second operand has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:24,325 INFO L93 Difference]: Finished difference Result 818 states and 891 transitions. [2022-07-20 05:20:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 05:20:24,325 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-20 05:20:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:24,327 INFO L225 Difference]: With dead ends: 818 [2022-07-20 05:20:24,327 INFO L226 Difference]: Without dead ends: 814 [2022-07-20 05:20:24,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 05:20:24,328 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 852 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:24,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 670 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:20:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-07-20 05:20:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 548. [2022-07-20 05:20:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 544 states have (on average 1.1286764705882353) internal successors, (614), 547 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 614 transitions. [2022-07-20 05:20:24,333 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 614 transitions. Word has length 56 [2022-07-20 05:20:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:24,333 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 614 transitions. [2022-07-20 05:20:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 614 transitions. [2022-07-20 05:20:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 05:20:24,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:24,334 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:24,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:24,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-20 05:20:24,551 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1540257805, now seen corresponding path program 13 times [2022-07-20 05:20:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551992326] [2022-07-20 05:20:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:24,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:24,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:24,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551992326] [2022-07-20 05:20:24,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551992326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:24,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777858479] [2022-07-20 05:20:24,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:20:24,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:24,812 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:24,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:20:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 05:20:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:24,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:24,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:25,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:26,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777858479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:26,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:26,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-07-20 05:20:26,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244567635] [2022-07-20 05:20:26,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:26,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 05:20:26,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 05:20:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2722, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 05:20:26,045 INFO L87 Difference]: Start difference. First operand 548 states and 614 transitions. Second operand has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 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) [2022-07-20 05:20:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:27,785 INFO L93 Difference]: Finished difference Result 1083 states and 1178 transitions. [2022-07-20 05:20:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 05:20:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 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) Word has length 57 [2022-07-20 05:20:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:27,787 INFO L225 Difference]: With dead ends: 1083 [2022-07-20 05:20:27,787 INFO L226 Difference]: Without dead ends: 1063 [2022-07-20 05:20:27,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=5142, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 05:20:27,788 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 784 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:27,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 2010 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:20:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-07-20 05:20:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 598. [2022-07-20 05:20:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 594 states have (on average 1.1228956228956228) internal successors, (667), 597 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 667 transitions. [2022-07-20 05:20:27,794 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 667 transitions. Word has length 57 [2022-07-20 05:20:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:27,795 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 667 transitions. [2022-07-20 05:20:27,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 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) [2022-07-20 05:20:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 667 transitions. [2022-07-20 05:20:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 05:20:27,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:27,796 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:27,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:28,010 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash 415651818, now seen corresponding path program 5 times [2022-07-20 05:20:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:28,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539022423] [2022-07-20 05:20:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:20:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539022423] [2022-07-20 05:20:28,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539022423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705668819] [2022-07-20 05:20:28,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:20:28,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:28,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:28,357 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:28,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:20:28,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:20:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:28,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-20 05:20:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:28,523 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:28,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:20:28,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-20 05:20:28,872 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:28,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:20:28,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-20 05:20:29,081 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:29,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-20 05:20:29,240 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:29,240 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 23 treesize of output 23 [2022-07-20 05:20:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:29,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:30,257 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:30,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:20:30,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:30,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:20:30,270 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 11 treesize of output 7 [2022-07-20 05:20:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:30,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705668819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:30,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:30,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 60 [2022-07-20 05:20:30,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189196581] [2022-07-20 05:20:30,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:30,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-20 05:20:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-20 05:20:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3258, Unknown=3, NotChecked=0, Total=3540 [2022-07-20 05:20:30,894 INFO L87 Difference]: Start difference. First operand 598 states and 667 transitions. Second operand has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:33,429 INFO L93 Difference]: Finished difference Result 1183 states and 1263 transitions. [2022-07-20 05:20:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-20 05:20:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-20 05:20:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:33,431 INFO L225 Difference]: With dead ends: 1183 [2022-07-20 05:20:33,431 INFO L226 Difference]: Without dead ends: 938 [2022-07-20 05:20:33,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=971, Invalid=10774, Unknown=27, NotChecked=0, Total=11772 [2022-07-20 05:20:33,432 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 316 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:33,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 847 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 738 Invalid, 0 Unknown, 500 Unchecked, 0.3s Time] [2022-07-20 05:20:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-07-20 05:20:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 698. [2022-07-20 05:20:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 694 states have (on average 1.1123919308357348) internal successors, (772), 697 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 772 transitions. [2022-07-20 05:20:33,438 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 772 transitions. Word has length 57 [2022-07-20 05:20:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:33,438 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 772 transitions. [2022-07-20 05:20:33,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 772 transitions. [2022-07-20 05:20:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 05:20:33,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:33,439 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:33,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-20 05:20:33,675 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1575967116, now seen corresponding path program 14 times [2022-07-20 05:20:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:33,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300435617] [2022-07-20 05:20:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:33,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:33,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300435617] [2022-07-20 05:20:33,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300435617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:33,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447538270] [2022-07-20 05:20:33,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:20:33,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:33,979 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:33,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:20:34,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:20:34,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-20 05:20:34,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:34,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:34,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-20 05:20:34,386 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 20 treesize of output 22 [2022-07-20 05:20:34,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:20:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:34,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:34,563 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:20:34,568 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:34,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:20:34,572 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:34,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:20:34,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:20:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:34,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447538270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:34,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:34,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 40 [2022-07-20 05:20:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902242222] [2022-07-20 05:20:34,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:34,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:20:34,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:20:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1373, Unknown=1, NotChecked=74, Total=1560 [2022-07-20 05:20:34,776 INFO L87 Difference]: Start difference. First operand 698 states and 772 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 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) [2022-07-20 05:20:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:35,884 INFO L93 Difference]: Finished difference Result 1559 states and 1679 transitions. [2022-07-20 05:20:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:20:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 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 59 [2022-07-20 05:20:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:35,890 INFO L225 Difference]: With dead ends: 1559 [2022-07-20 05:20:35,890 INFO L226 Difference]: Without dead ends: 1494 [2022-07-20 05:20:35,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=2267, Unknown=1, NotChecked=96, Total=2550 [2022-07-20 05:20:35,891 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 306 mSDsluCounter, 2664 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:35,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 2793 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2208 Invalid, 0 Unknown, 291 Unchecked, 0.8s Time] [2022-07-20 05:20:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-07-20 05:20:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 742. [2022-07-20 05:20:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 738 states have (on average 1.1165311653116532) internal successors, (824), 741 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 824 transitions. [2022-07-20 05:20:35,898 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 824 transitions. Word has length 59 [2022-07-20 05:20:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:35,899 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 824 transitions. [2022-07-20 05:20:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 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) [2022-07-20 05:20:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 824 transitions. [2022-07-20 05:20:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 05:20:35,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:35,900 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-07-20 05:20:35,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:36,117 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,SelfDestructingSolverStorable49 [2022-07-20 05:20:36,117 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash -105949010, now seen corresponding path program 5 times [2022-07-20 05:20:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:36,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201563475] [2022-07-20 05:20:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201563475] [2022-07-20 05:20:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201563475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167810635] [2022-07-20 05:20:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:20:36,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:36,274 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:36,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:20:36,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:20:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 05:20:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:36,430 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:36,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:20:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:36,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:36,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167810635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:36,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:36,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-20 05:20:36,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372320266] [2022-07-20 05:20:36,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:36,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 05:20:36,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 05:20:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:20:36,941 INFO L87 Difference]: Start difference. First operand 742 states and 824 transitions. Second operand has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 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) [2022-07-20 05:20:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:37,426 INFO L93 Difference]: Finished difference Result 932 states and 1009 transitions. [2022-07-20 05:20:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:20:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 05:20:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:37,429 INFO L225 Difference]: With dead ends: 932 [2022-07-20 05:20:37,429 INFO L226 Difference]: Without dead ends: 932 [2022-07-20 05:20:37,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:20:37,430 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 453 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:37,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 484 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:20:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-07-20 05:20:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 727. [2022-07-20 05:20:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 723 states have (on average 1.1175656984785616) internal successors, (808), 726 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 808 transitions. [2022-07-20 05:20:37,436 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 808 transitions. Word has length 59 [2022-07-20 05:20:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:37,436 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 808 transitions. [2022-07-20 05:20:37,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 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) [2022-07-20 05:20:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 808 transitions. [2022-07-20 05:20:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 05:20:37,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:37,437 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:37,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:37,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:37,651 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 3 times [2022-07-20 05:20:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433405025] [2022-07-20 05:20:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:37,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433405025] [2022-07-20 05:20:37,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433405025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:37,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298177122] [2022-07-20 05:20:37,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:37,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:37,861 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:37,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:20:38,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 05:20:38,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 05:20:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:38,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:38,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:38,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:39,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:20:39,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298177122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:39,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:39,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-07-20 05:20:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2177278] [2022-07-20 05:20:39,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 05:20:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 05:20:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:20:39,176 INFO L87 Difference]: Start difference. First operand 727 states and 808 transitions. Second operand has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:42,256 INFO L93 Difference]: Finished difference Result 1232 states and 1324 transitions. [2022-07-20 05:20:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-20 05:20:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 05:20:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:42,259 INFO L225 Difference]: With dead ends: 1232 [2022-07-20 05:20:42,259 INFO L226 Difference]: Without dead ends: 1199 [2022-07-20 05:20:42,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1882, Invalid=8018, Unknown=0, NotChecked=0, Total=9900 [2022-07-20 05:20:42,260 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 899 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:42,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 956 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:20:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-07-20 05:20:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 695. [2022-07-20 05:20:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 691 states have (on average 1.1186685962373373) internal successors, (773), 694 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 773 transitions. [2022-07-20 05:20:42,267 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 773 transitions. Word has length 62 [2022-07-20 05:20:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:42,267 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 773 transitions. [2022-07-20 05:20:42,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 773 transitions. [2022-07-20 05:20:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 05:20:42,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:42,269 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:42,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:42,487 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1265880983, now seen corresponding path program 15 times [2022-07-20 05:20:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883161667] [2022-07-20 05:20:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:42,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:42,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883161667] [2022-07-20 05:20:42,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883161667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:42,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256936949] [2022-07-20 05:20:42,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:20:42,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:42,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:42,910 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:42,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:20:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-20 05:20:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:43,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:20:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:43,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:43,074 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 10 treesize of output 8 [2022-07-20 05:20:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:43,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:44,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 120 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:44,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256936949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:44,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:44,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 64 [2022-07-20 05:20:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751679298] [2022-07-20 05:20:44,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:44,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 05:20:44,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:44,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 05:20:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3686, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:20:44,533 INFO L87 Difference]: Start difference. First operand 695 states and 773 transitions. Second operand has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:48,276 INFO L93 Difference]: Finished difference Result 1624 states and 1747 transitions. [2022-07-20 05:20:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 05:20:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 05:20:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:48,281 INFO L225 Difference]: With dead ends: 1624 [2022-07-20 05:20:48,281 INFO L226 Difference]: Without dead ends: 1598 [2022-07-20 05:20:48,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2644, Invalid=10238, Unknown=0, NotChecked=0, Total=12882 [2022-07-20 05:20:48,282 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1199 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:48,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1646 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:20:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-07-20 05:20:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 759. [2022-07-20 05:20:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 755 states have (on average 1.1125827814569536) internal successors, (840), 758 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 840 transitions. [2022-07-20 05:20:48,290 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 840 transitions. Word has length 63 [2022-07-20 05:20:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:48,290 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 840 transitions. [2022-07-20 05:20:48,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 840 transitions. [2022-07-20 05:20:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 05:20:48,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:48,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:48,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:48,508 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,SelfDestructingSolverStorable52 [2022-07-20 05:20:48,509 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash -749215359, now seen corresponding path program 1 times [2022-07-20 05:20:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801897460] [2022-07-20 05:20:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801897460] [2022-07-20 05:20:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801897460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647848871] [2022-07-20 05:20:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:48,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:48,725 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:48,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:20:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:48,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-20 05:20:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:20:48,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:20:48,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:49,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:50,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:20:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647848871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:50,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:50,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 48 [2022-07-20 05:20:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375165411] [2022-07-20 05:20:50,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:50,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 05:20:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 05:20:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 05:20:50,158 INFO L87 Difference]: Start difference. First operand 759 states and 840 transitions. Second operand has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:52,118 INFO L93 Difference]: Finished difference Result 1201 states and 1293 transitions. [2022-07-20 05:20:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 05:20:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 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 [2022-07-20 05:20:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:52,120 INFO L225 Difference]: With dead ends: 1201 [2022-07-20 05:20:52,120 INFO L226 Difference]: Without dead ends: 1201 [2022-07-20 05:20:52,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1901, Invalid=6471, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 05:20:52,121 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 628 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:52,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 416 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:20:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-07-20 05:20:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 771. [2022-07-20 05:20:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 767 states have (on average 1.1160365058670143) internal successors, (856), 770 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 856 transitions. [2022-07-20 05:20:52,128 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 856 transitions. Word has length 64 [2022-07-20 05:20:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:52,128 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 856 transitions. [2022-07-20 05:20:52,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 856 transitions. [2022-07-20 05:20:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 05:20:52,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:52,129 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:52,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:52,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:52,342 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:52,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:52,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1035879294, now seen corresponding path program 16 times [2022-07-20 05:20:52,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:52,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450246222] [2022-07-20 05:20:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:52,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 27 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:20:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:52,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450246222] [2022-07-20 05:20:52,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450246222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:52,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124499545] [2022-07-20 05:20:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:20:52,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:52,706 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:52,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:20:52,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:20:52,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-20 05:20:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:52,854 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:20:52,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:20:52,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:53,372 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 16 treesize of output 12 [2022-07-20 05:20:53,414 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 19 treesize of output 21 [2022-07-20 05:20:53,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:53,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-20 05:20:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:54,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:20:54,756 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:54,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-20 05:20:54,762 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:54,762 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 36 treesize of output 36 [2022-07-20 05:20:54,765 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 [2022-07-20 05:20:55,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:55,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 76 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:55,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124499545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:20:55,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:20:55,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 73 [2022-07-20 05:20:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335015306] [2022-07-20 05:20:55,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:20:55,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 05:20:55,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:20:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 05:20:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4799, Unknown=1, NotChecked=0, Total=5256 [2022-07-20 05:20:55,796 INFO L87 Difference]: Start difference. First operand 771 states and 856 transitions. Second operand has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:20:58,272 INFO L93 Difference]: Finished difference Result 1974 states and 2116 transitions. [2022-07-20 05:20:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 05:20:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-20 05:20:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:20:58,276 INFO L225 Difference]: With dead ends: 1974 [2022-07-20 05:20:58,276 INFO L226 Difference]: Without dead ends: 1880 [2022-07-20 05:20:58,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2704 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=940, Invalid=11049, Unknown=1, NotChecked=0, Total=11990 [2022-07-20 05:20:58,277 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 363 mSDsluCounter, 4327 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 4476 SdHoareTripleChecker+Invalid, 4071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:20:58,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 4476 Invalid, 4071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3062 Invalid, 0 Unknown, 952 Unchecked, 1.1s Time] [2022-07-20 05:20:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-07-20 05:20:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 817. [2022-07-20 05:20:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.120541205412054) internal successors, (911), 816 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 911 transitions. [2022-07-20 05:20:58,285 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 911 transitions. Word has length 65 [2022-07-20 05:20:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:20:58,285 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 911 transitions. [2022-07-20 05:20:58,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:20:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 911 transitions. [2022-07-20 05:20:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 05:20:58,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:20:58,286 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:20:58,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:20:58,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-20 05:20:58,486 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:20:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:20:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash 229195360, now seen corresponding path program 6 times [2022-07-20 05:20:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:20:58,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902780459] [2022-07-20 05:20:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:20:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:20:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:20:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:20:59,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902780459] [2022-07-20 05:20:59,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902780459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:20:59,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519623420] [2022-07-20 05:20:59,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:20:59,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:20:59,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:20:59,034 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:20:59,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:20:59,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:20:59,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:20:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-20 05:20:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:20:59,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:20:59,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:20:59,688 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 [2022-07-20 05:20:59,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:20:59,892 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 [2022-07-20 05:20:59,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:20:59,995 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:20:59,995 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 15 treesize of output 10 [2022-07-20 05:20:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:20:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:00,009 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-20 05:21:00,013 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-20 05:21:00,023 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) is different from false [2022-07-20 05:21:00,068 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 3 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) 0) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)))) is different from false [2022-07-20 05:21:00,092 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|))) is different from false [2022-07-20 05:21:00,098 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:00,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:21:00,102 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:00,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:21:00,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:21:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 33 not checked. [2022-07-20 05:21:00,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519623420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:00,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:00,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 21] total 58 [2022-07-20 05:21:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169693798] [2022-07-20 05:21:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:00,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-20 05:21:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-20 05:21:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2486, Unknown=5, NotChecked=530, Total=3306 [2022-07-20 05:21:00,699 INFO L87 Difference]: Start difference. First operand 817 states and 911 transitions. Second operand has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 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) [2022-07-20 05:21:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:01,675 INFO L93 Difference]: Finished difference Result 841 states and 934 transitions. [2022-07-20 05:21:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:21:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 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) Word has length 65 [2022-07-20 05:21:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:01,677 INFO L225 Difference]: With dead ends: 841 [2022-07-20 05:21:01,677 INFO L226 Difference]: Without dead ends: 817 [2022-07-20 05:21:01,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=445, Invalid=3992, Unknown=5, NotChecked=670, Total=5112 [2022-07-20 05:21:01,679 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:01,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 640 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 924 Invalid, 0 Unknown, 360 Unchecked, 0.4s Time] [2022-07-20 05:21:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-07-20 05:21:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-07-20 05:21:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.119311193111931) internal successors, (910), 816 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 910 transitions. [2022-07-20 05:21:01,685 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 910 transitions. Word has length 65 [2022-07-20 05:21:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:01,685 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 910 transitions. [2022-07-20 05:21:01,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 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) [2022-07-20 05:21:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 910 transitions. [2022-07-20 05:21:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 05:21:01,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:01,686 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:01,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:01,903 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -85875271, now seen corresponding path program 6 times [2022-07-20 05:21:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576973785] [2022-07-20 05:21:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:21:02,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:02,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576973785] [2022-07-20 05:21:02,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576973785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:02,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126139402] [2022-07-20 05:21:02,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:21:02,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:02,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:02,440 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:02,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:21:02,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:21:02,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:02,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 119 conjunts are in the unsatisfiable core [2022-07-20 05:21:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:02,622 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:02,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:02,633 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:21:02,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-07-20 05:21:03,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:21:03,486 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 25 treesize of output 25 [2022-07-20 05:21:03,682 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 11 treesize of output 7 [2022-07-20 05:21:03,730 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 [2022-07-20 05:21:03,824 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 [2022-07-20 05:21:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:03,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:03,952 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 29 treesize of output 35 [2022-07-20 05:21:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:04,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:04,490 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)))) is different from false [2022-07-20 05:21:04,505 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (< (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|))) is different from false [2022-07-20 05:21:05,156 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:05,157 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 35 treesize of output 34 [2022-07-20 05:21:05,168 INFO L356 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2022-07-20 05:21:05,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 37 [2022-07-20 05:21:05,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:05,181 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:05,181 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 40 treesize of output 44 [2022-07-20 05:21:05,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-20 05:21:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 23 not checked. [2022-07-20 05:21:06,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126139402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:06,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:21:06,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 27] total 78 [2022-07-20 05:21:06,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021477701] [2022-07-20 05:21:06,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:06,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-20 05:21:06,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:21:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-20 05:21:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=5320, Unknown=2, NotChecked=298, Total=6006 [2022-07-20 05:21:06,692 INFO L87 Difference]: Start difference. First operand 817 states and 910 transitions. Second operand has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:11,829 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (< (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|))))) (and .cse0 (or .cse0 (not (= (select |c_#valid| |c_ULTIMATE.start_cstrncat_#t~post4#1.base|) 1))))) is different from false [2022-07-20 05:21:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:13,877 INFO L93 Difference]: Finished difference Result 1005 states and 1091 transitions. [2022-07-20 05:21:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-20 05:21:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 05:21:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:13,879 INFO L225 Difference]: With dead ends: 1005 [2022-07-20 05:21:13,879 INFO L226 Difference]: Without dead ends: 908 [2022-07-20 05:21:13,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4453 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1767, Invalid=16874, Unknown=3, NotChecked=816, Total=19460 [2022-07-20 05:21:13,880 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 537 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1474 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:13,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1072 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1735 Invalid, 0 Unknown, 1474 Unchecked, 0.8s Time] [2022-07-20 05:21:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-07-20 05:21:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 843. [2022-07-20 05:21:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 839 states have (on average 1.1108462455303934) internal successors, (932), 842 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 932 transitions. [2022-07-20 05:21:13,886 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 932 transitions. Word has length 67 [2022-07-20 05:21:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:13,886 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 932 transitions. [2022-07-20 05:21:13,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 932 transitions. [2022-07-20 05:21:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 05:21:13,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:13,887 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:13,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-20 05:21:14,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-20 05:21:14,099 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1839858857, now seen corresponding path program 4 times [2022-07-20 05:21:14,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:21:14,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490240294] [2022-07-20 05:21:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:14,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:21:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:21:14,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:21:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490240294] [2022-07-20 05:21:14,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490240294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:21:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683105348] [2022-07-20 05:21:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:21:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:21:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:14,299 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:21:14,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:21:14,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:21:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-20 05:21:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:14,441 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:14,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:14,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 05:21:14,754 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:14,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-07-20 05:21:14,757 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-20 05:21:14,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:14,958 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,SelfDestructingSolverStorable57 [2022-07-20 05:21:14,958 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:269) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-20 05:21:14,962 INFO L158 Benchmark]: Toolchain (without parser) took 135614.16ms. Allocated memory was 83.9MB in the beginning and 226.5MB in the end (delta: 142.6MB). Free memory was 46.4MB in the beginning and 186.2MB in the end (delta: -139.8MB). Peak memory consumption was 1.6MB. Max. memory is 16.1GB. [2022-07-20 05:21:14,962 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory was 63.4MB in the beginning and 63.4MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 05:21:14,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 381.87ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 46.2MB in the beginning and 74.6MB in the end (delta: -28.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2022-07-20 05:21:14,963 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.63ms. Allocated memory is still 107.0MB. Free memory was 74.6MB in the beginning and 72.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 05:21:14,963 INFO L158 Benchmark]: Boogie Preprocessor took 31.09ms. Allocated memory is still 107.0MB. Free memory was 72.6MB in the beginning and 71.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 05:21:14,963 INFO L158 Benchmark]: RCFGBuilder took 419.78ms. Allocated memory is still 107.0MB. Free memory was 71.2MB in the beginning and 56.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-20 05:21:14,963 INFO L158 Benchmark]: TraceAbstraction took 134726.52ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 55.8MB in the beginning and 186.2MB in the end (delta: -130.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 05:21:14,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory was 63.4MB in the beginning and 63.4MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 381.87ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 46.2MB in the beginning and 74.6MB in the end (delta: -28.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.63ms. Allocated memory is still 107.0MB. Free memory was 74.6MB in the beginning and 72.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.09ms. Allocated memory is still 107.0MB. Free memory was 72.6MB in the beginning and 71.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 419.78ms. Allocated memory is still 107.0MB. Free memory was 71.2MB in the beginning and 56.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 134726.52ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 55.8MB in the beginning and 186.2MB in the end (delta: -130.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-20 05:21:14,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/cstrncat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:21:16,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:21:16,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:21:16,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:21:16,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:21:16,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:21:16,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:21:16,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:21:16,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:21:16,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:21:16,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:21:16,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:21:16,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:21:16,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:21:16,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:21:16,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:21:16,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:21:16,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:21:16,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:21:16,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:21:16,593 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:21:16,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:21:16,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:21:16,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:21:16,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:21:16,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:21:16,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:21:16,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:21:16,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:21:16,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:21:16,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:21:16,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:21:16,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:21:16,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:21:16,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:21:16,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:21:16,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:21:16,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:21:16,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:21:16,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:21:16,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:21:16,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:21:16,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 05:21:16,643 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:21:16,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:21:16,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:21:16,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:21:16,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:21:16,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:21:16,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:21:16,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:21:16,646 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:21:16,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:21:16,646 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:21:16,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:21:16,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:21:16,648 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 05:21:16,648 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 05:21:16,648 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:21:16,648 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:21:16,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:21:16,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:21:16,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:21:16,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:21:16,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:21:16,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:21:16,649 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 05:21:16,650 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 05:21:16,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 05:21:16,650 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2022-07-20 05:21:16,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:21:16,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:21:16,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:21:16,914 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:21:16,915 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:21:16,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-20 05:21:16,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05fad73b/8bb182515f6f4f00ac323a2ea1758e53/FLAG2c3197fbd [2022-07-20 05:21:17,357 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:21:17,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-20 05:21:17,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05fad73b/8bb182515f6f4f00ac323a2ea1758e53/FLAG2c3197fbd [2022-07-20 05:21:17,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05fad73b/8bb182515f6f4f00ac323a2ea1758e53 [2022-07-20 05:21:17,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:21:17,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:21:17,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:21:17,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:21:17,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:21:17,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:21:17" (1/1) ... [2022-07-20 05:21:17,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15dc7e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:17, skipping insertion in model container [2022-07-20 05:21:17,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:21:17" (1/1) ... [2022-07-20 05:21:17,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:21:17,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:21:18,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:21:18,037 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:21:18,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:21:18,105 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:21:18,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18 WrapperNode [2022-07-20 05:21:18,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:21:18,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:21:18,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:21:18,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:21:18,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,156 INFO L137 Inliner]: procedures = 118, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-20 05:21:18,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:21:18,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:21:18,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:21:18,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:21:18,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:21:18,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:21:18,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:21:18,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:21:18,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (1/1) ... [2022-07-20 05:21:18,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:21:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:21:18,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 05:21:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 05:21:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-20 05:21:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:21:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-20 05:21:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:21:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:21:18,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:21:18,370 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:21:18,371 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:21:18,677 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:21:18,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:21:18,682 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 05:21:18,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:21:18 BoogieIcfgContainer [2022-07-20 05:21:18,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:21:18,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:21:18,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:21:18,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:21:18,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:21:17" (1/3) ... [2022-07-20 05:21:18,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fcf29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:21:18, skipping insertion in model container [2022-07-20 05:21:18,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:21:18" (2/3) ... [2022-07-20 05:21:18,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fcf29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:21:18, skipping insertion in model container [2022-07-20 05:21:18,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:21:18" (3/3) ... [2022-07-20 05:21:18,692 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2022-07-20 05:21:18,701 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:21:18,701 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-20 05:21:18,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:21:18,742 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@6a96a848, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a35f10e [2022-07-20 05:21:18,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-20 05:21:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:21:18,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:18,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:18,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:18,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2022-07-20 05:21:18,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:18,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214013664] [2022-07-20 05:21:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:18,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:18,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 05:21:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 05:21:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:18,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:18,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:18,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214013664] [2022-07-20 05:21:18,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214013664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:18,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:18,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:21:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575762294] [2022-07-20 05:21:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:18,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:21:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:21:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:21:18,948 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:19,017 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-20 05:21:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:21:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:21:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:19,024 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:21:19,024 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:21:19,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:21:19,032 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:19,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:21:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:21:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-20 05:21:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 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) [2022-07-20 05:21:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-20 05:21:19,060 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-20 05:21:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:19,060 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-20 05:21:19,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-20 05:21:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:21:19,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:19,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:19,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:19,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:19,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-20 05:21:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:19,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555213955] [2022-07-20 05:21:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:19,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:19,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:19,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 05:21:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:21:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:19,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:19,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555213955] [2022-07-20 05:21:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555213955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:19,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:19,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589835453] [2022-07-20 05:21:19,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:19,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:19,429 INFO L87 Difference]: Start difference. First operand 51 states and 59 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) [2022-07-20 05:21:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:19,551 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2022-07-20 05:21:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:19,554 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 [2022-07-20 05:21:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:19,556 INFO L225 Difference]: With dead ends: 147 [2022-07-20 05:21:19,556 INFO L226 Difference]: Without dead ends: 146 [2022-07-20 05:21:19,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:19,557 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:19,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 187 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-20 05:21:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 53. [2022-07-20 05:21:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-20 05:21:19,569 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 8 [2022-07-20 05:21:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:19,569 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-20 05:21:19,569 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) [2022-07-20 05:21:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-20 05:21:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:21:19,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:19,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:19,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:19,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash 121448497, now seen corresponding path program 1 times [2022-07-20 05:21:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:19,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010386661] [2022-07-20 05:21:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:19,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:19,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:19,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 05:21:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:21:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:19,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:19,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:19,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010386661] [2022-07-20 05:21:19,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010386661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:19,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:19,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:19,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864314553] [2022-07-20 05:21:19,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:19,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:19,879 INFO L87 Difference]: Start difference. First operand 53 states and 62 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) [2022-07-20 05:21:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:19,947 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-20 05:21:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:19,948 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 [2022-07-20 05:21:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:19,949 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:21:19,949 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:21:19,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:19,950 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 47 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:19,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 198 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:21:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2022-07-20 05:21:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-07-20 05:21:19,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 8 [2022-07-20 05:21:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:19,955 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-07-20 05:21:19,955 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) [2022-07-20 05:21:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-07-20 05:21:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:21:19,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:19,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:19,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:20,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:20,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-20 05:21:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:20,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541263009] [2022-07-20 05:21:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:20,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:20,158 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:20,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 05:21:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:21:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:20,224 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 05:21:20,224 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 14 [2022-07-20 05:21:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:20,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:20,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541263009] [2022-07-20 05:21:20,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541263009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:20,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:20,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:21:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737245371] [2022-07-20 05:21:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:20,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:21:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:21:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:21:20,257 INFO L87 Difference]: Start difference. First operand 56 states and 66 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) [2022-07-20 05:21:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:20,310 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-07-20 05:21:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:21:20,310 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 [2022-07-20 05:21:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:20,311 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:21:20,311 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 05:21:20,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:21:20,312 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:20,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:21:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 05:21:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-20 05:21:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-20 05:21:20,315 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 8 [2022-07-20 05:21:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:20,315 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-20 05:21:20,315 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) [2022-07-20 05:21:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-20 05:21:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:21:20,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:20,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:20,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:20,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:20,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-20 05:21:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607235107] [2022-07-20 05:21:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:20,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:20,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:20,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:20,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 05:21:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:21:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:20,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:20,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:20,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:20,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:20,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607235107] [2022-07-20 05:21:20,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607235107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:20,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:20,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:21:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923542787] [2022-07-20 05:21:20,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:21:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:21:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:21:20,637 INFO L87 Difference]: Start difference. First operand 54 states and 64 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) [2022-07-20 05:21:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:20,798 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2022-07-20 05:21:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:21:20,799 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 [2022-07-20 05:21:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:20,799 INFO L225 Difference]: With dead ends: 96 [2022-07-20 05:21:20,799 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 05:21:20,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:20,800 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 142 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:20,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 05:21:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 56. [2022-07-20 05:21:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-07-20 05:21:20,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 8 [2022-07-20 05:21:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:20,803 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-07-20 05:21:20,804 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) [2022-07-20 05:21:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-07-20 05:21:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:20,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:20,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:20,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:21,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:21,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 747838313, now seen corresponding path program 1 times [2022-07-20 05:21:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915401445] [2022-07-20 05:21:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:21,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:21,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:21,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 05:21:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:21,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:21:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:21,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:21,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:21,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915401445] [2022-07-20 05:21:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915401445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:21,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117638742] [2022-07-20 05:21:21,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:21,083 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:21,134 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-20 05:21:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:21,135 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:21:21,136 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:21:21,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:21,136 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:21,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 145 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:21:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:21:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-07-20 05:21:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-20 05:21:21,139 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 10 [2022-07-20 05:21:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:21,139 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-20 05:21:21,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-20 05:21:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:21,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:21,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:21,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:21,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1829379923, now seen corresponding path program 1 times [2022-07-20 05:21:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163890547] [2022-07-20 05:21:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:21,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:21,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:21,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:21,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 05:21:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:21:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:21,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:21,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:21,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163890547] [2022-07-20 05:21:21,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163890547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:21,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:21,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234147829] [2022-07-20 05:21:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:21,421 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:21,490 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-07-20 05:21:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:21,494 INFO L225 Difference]: With dead ends: 94 [2022-07-20 05:21:21,495 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:21:21,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:21,496 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:21,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 176 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:21:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-07-20 05:21:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-20 05:21:21,505 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 10 [2022-07-20 05:21:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:21,507 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-20 05:21:21,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-20 05:21:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:21,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:21,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:21,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:21,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121621, now seen corresponding path program 1 times [2022-07-20 05:21:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:21,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378265629] [2022-07-20 05:21:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:21,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:21,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:21,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 05:21:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:21:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:21,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:21,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:21,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378265629] [2022-07-20 05:21:21,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378265629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:21,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:21,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:21,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292386596] [2022-07-20 05:21:21,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:21,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:21,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:21,799 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:21,828 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-07-20 05:21:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:21,830 INFO L225 Difference]: With dead ends: 54 [2022-07-20 05:21:21,830 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:21:21,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:21,830 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:21,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 106 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:21:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:21:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-20 05:21:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 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) [2022-07-20 05:21:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-20 05:21:21,842 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 10 [2022-07-20 05:21:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:21,842 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-20 05:21:21,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-20 05:21:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:21,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:21,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:21,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:22,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-20 05:21:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366334784] [2022-07-20 05:21:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:22,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:22,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 05:21:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:21:22,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:22,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:22,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:22,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:22,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366334784] [2022-07-20 05:21:22,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366334784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:22,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:22,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:21:22,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780499441] [2022-07-20 05:21:22,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:22,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:21:22,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:21:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:21:22,271 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:22,785 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2022-07-20 05:21:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:21:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:22,787 INFO L225 Difference]: With dead ends: 183 [2022-07-20 05:21:22,787 INFO L226 Difference]: Without dead ends: 183 [2022-07-20 05:21:22,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:21:22,787 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 380 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:22,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 213 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:21:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-20 05:21:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 60. [2022-07-20 05:21:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.697674418604651) internal successors, (73), 59 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) [2022-07-20 05:21:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-07-20 05:21:22,790 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 10 [2022-07-20 05:21:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:22,790 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-07-20 05:21:22,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-07-20 05:21:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:22,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:22,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:22,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:22,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2022-07-20 05:21:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:22,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145701981] [2022-07-20 05:21:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:22,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:22,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:22,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 05:21:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:21:23,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:23,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:23,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:23,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145701981] [2022-07-20 05:21:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145701981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:23,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:23,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:21:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204794068] [2022-07-20 05:21:23,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:23,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:21:23,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:21:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:21:23,043 INFO L87 Difference]: Start difference. First operand 60 states and 73 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) [2022-07-20 05:21:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:23,082 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-07-20 05:21:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:21:23,082 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 [2022-07-20 05:21:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:23,083 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:21:23,083 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:21:23,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:21:23,083 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:23,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:21:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:21:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2022-07-20 05:21:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-20 05:21:23,086 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 10 [2022-07-20 05:21:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:23,086 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-20 05:21:23,087 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) [2022-07-20 05:21:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-20 05:21:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:23,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:23,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:23,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:23,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash -61508313, now seen corresponding path program 1 times [2022-07-20 05:21:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:23,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439149229] [2022-07-20 05:21:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:23,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:23,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:23,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:23,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 05:21:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:23,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:21:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:23,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:23,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:23,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:23,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:23,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439149229] [2022-07-20 05:21:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439149229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:23,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:21:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815375839] [2022-07-20 05:21:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:23,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:21:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:21:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:21:23,583 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:23,997 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2022-07-20 05:21:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:21:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:23,998 INFO L225 Difference]: With dead ends: 132 [2022-07-20 05:21:23,999 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 05:21:23,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:21:23,999 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 208 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:23,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 218 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:21:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 05:21:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 64. [2022-07-20 05:21:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-07-20 05:21:24,002 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2022-07-20 05:21:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:24,002 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-07-20 05:21:24,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-07-20 05:21:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:24,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:24,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:24,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:24,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:24,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240747, now seen corresponding path program 1 times [2022-07-20 05:21:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850959838] [2022-07-20 05:21:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:24,211 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 05:21:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:21:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:24,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:24,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:24,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:24,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:24,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850959838] [2022-07-20 05:21:24,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850959838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:24,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:24,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:21:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567225553] [2022-07-20 05:21:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:21:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:21:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:21:24,577 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:25,103 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2022-07-20 05:21:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:21:25,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:25,105 INFO L225 Difference]: With dead ends: 158 [2022-07-20 05:21:25,105 INFO L226 Difference]: Without dead ends: 158 [2022-07-20 05:21:25,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:21:25,105 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 188 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:25,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 197 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-20 05:21:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-20 05:21:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 66. [2022-07-20 05:21:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-20 05:21:25,108 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 10 [2022-07-20 05:21:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:25,108 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-20 05:21:25,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-20 05:21:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:21:25,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:25,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:25,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:25,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:25,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1713499049, now seen corresponding path program 1 times [2022-07-20 05:21:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:25,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669823449] [2022-07-20 05:21:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:25,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:25,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:25,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 05:21:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:21:25,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:25,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:25,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:25,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:25,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:25,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:25,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669823449] [2022-07-20 05:21:25,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669823449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:25,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:25,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:21:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512536756] [2022-07-20 05:21:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:25,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:21:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:21:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:21:25,778 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:26,157 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-07-20 05:21:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:21:26,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:21:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:26,161 INFO L225 Difference]: With dead ends: 111 [2022-07-20 05:21:26,161 INFO L226 Difference]: Without dead ends: 111 [2022-07-20 05:21:26,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:21:26,162 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 110 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:26,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 161 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-07-20 05:21:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-20 05:21:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2022-07-20 05:21:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-07-20 05:21:26,164 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2022-07-20 05:21:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:26,164 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-07-20 05:21:26,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-07-20 05:21:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:21:26,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:26,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:26,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:26,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2022-07-20 05:21:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875101941] [2022-07-20 05:21:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:26,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:26,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:26,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 05:21:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:26,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:21:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:26,431 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 05:21:26,431 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 18 [2022-07-20 05:21:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:26,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:26,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875101941] [2022-07-20 05:21:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875101941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:21:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015905198] [2022-07-20 05:21:26,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:26,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:21:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:21:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:21:26,444 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:26,512 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-07-20 05:21:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:21:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 05:21:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:26,513 INFO L225 Difference]: With dead ends: 62 [2022-07-20 05:21:26,513 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 05:21:26,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:21:26,514 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:26,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 05:21:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-20 05:21:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.574468085106383) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-07-20 05:21:26,515 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2022-07-20 05:21:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:26,516 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-07-20 05:21:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-07-20 05:21:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:21:26,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:26,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:26,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:26,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:26,723 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2022-07-20 05:21:26,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:26,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402226957] [2022-07-20 05:21:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:26,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:26,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:26,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 05:21:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:21:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:26,807 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:26,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:26,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:26,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:26,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402226957] [2022-07-20 05:21:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402226957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:26,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:26,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:21:26,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999536917] [2022-07-20 05:21:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:26,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:21:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:21:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:21:26,839 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:26,894 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-20 05:21:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:21:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2022-07-20 05:21:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:26,895 INFO L225 Difference]: With dead ends: 95 [2022-07-20 05:21:26,895 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 05:21:26,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:21:26,895 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:26,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 84 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 05:21:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2022-07-20 05:21:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-07-20 05:21:26,897 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 11 [2022-07-20 05:21:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:26,897 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-07-20 05:21:26,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-07-20 05:21:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:21:26,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:26,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:26,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-20 05:21:27,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:27,104 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -196144391, now seen corresponding path program 1 times [2022-07-20 05:21:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165838415] [2022-07-20 05:21:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:27,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:27,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:27,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 05:21:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:21:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:27,215 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:27,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:27,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:27,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:27,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165838415] [2022-07-20 05:21:27,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165838415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:27,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:27,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:21:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259948379] [2022-07-20 05:21:27,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:27,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:21:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:27,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:21:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:21:27,342 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:27,504 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-07-20 05:21:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:21:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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 [2022-07-20 05:21:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:27,506 INFO L225 Difference]: With dead ends: 102 [2022-07-20 05:21:27,506 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 05:21:27,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:21:27,507 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 57 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:27,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 139 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-07-20 05:21:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 05:21:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2022-07-20 05:21:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.537037037037037) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-20 05:21:27,509 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 11 [2022-07-20 05:21:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:27,510 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-20 05:21:27,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-20 05:21:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:21:27,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:27,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:27,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:27,717 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1578862971, now seen corresponding path program 1 times [2022-07-20 05:21:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828376584] [2022-07-20 05:21:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:27,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:27,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:27,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 05:21:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:27,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:21:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:27,783 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:27,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:27,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:27,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:27,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828376584] [2022-07-20 05:21:27,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828376584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:27,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:27,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737821393] [2022-07-20 05:21:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:21:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:21:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:21:27,847 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:28,028 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2022-07-20 05:21:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:21:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 [2022-07-20 05:21:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:28,029 INFO L225 Difference]: With dead ends: 101 [2022-07-20 05:21:28,029 INFO L226 Difference]: Without dead ends: 101 [2022-07-20 05:21:28,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:21:28,030 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:28,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:21:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-20 05:21:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-07-20 05:21:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-20 05:21:28,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 11 [2022-07-20 05:21:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:28,031 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-20 05:21:28,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-20 05:21:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:21:28,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:28,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:28,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:28,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-20 05:21:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777510794] [2022-07-20 05:21:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:28,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:28,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 05:21:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:28,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:21:28,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:28,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:28,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:28,305 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 [2022-07-20 05:21:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:28,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:29,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:29,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777510794] [2022-07-20 05:21:29,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777510794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:29,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:29,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-20 05:21:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085159411] [2022-07-20 05:21:29,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:21:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:21:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:21:29,180 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:31,626 INFO L93 Difference]: Finished difference Result 283 states and 330 transitions. [2022-07-20 05:21:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:21:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 05:21:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:31,628 INFO L225 Difference]: With dead ends: 283 [2022-07-20 05:21:31,628 INFO L226 Difference]: Without dead ends: 283 [2022-07-20 05:21:31,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:21:31,629 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 680 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:31,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 355 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 05:21:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-20 05:21:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 98. [2022-07-20 05:21:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 97 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2022-07-20 05:21:31,632 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 12 [2022-07-20 05:21:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:31,632 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2022-07-20 05:21:31,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2022-07-20 05:21:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:21:31,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:31,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:31,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:31,838 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2022-07-20 05:21:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:31,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897158789] [2022-07-20 05:21:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:31,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:31,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:31,840 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:31,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 05:21:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:21:31,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:31,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:31,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:31,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897158789] [2022-07-20 05:21:31,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897158789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:31,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:31,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:21:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195230422] [2022-07-20 05:21:31,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:31,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:21:31,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:21:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:21:31,893 INFO L87 Difference]: Start difference. First operand 98 states and 122 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) [2022-07-20 05:21:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:31,988 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-07-20 05:21:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:21:31,989 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 [2022-07-20 05:21:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:31,989 INFO L225 Difference]: With dead ends: 94 [2022-07-20 05:21:31,989 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 05:21:31,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:31,990 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:31,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 05:21:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-20 05:21:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 93 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-07-20 05:21:31,992 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 13 [2022-07-20 05:21:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:31,992 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-07-20 05:21:31,992 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) [2022-07-20 05:21:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-07-20 05:21:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:21:31,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:31,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:31,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:32,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:32,193 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2022-07-20 05:21:32,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:32,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898020524] [2022-07-20 05:21:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:32,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:32,195 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:32,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 05:21:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 05:21:32,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:32,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:32,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:32,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898020524] [2022-07-20 05:21:32,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898020524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:32,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:32,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:21:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694275267] [2022-07-20 05:21:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:32,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:21:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:21:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:21:32,364 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:32,447 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2022-07-20 05:21:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:21:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 05:21:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:32,448 INFO L225 Difference]: With dead ends: 131 [2022-07-20 05:21:32,448 INFO L226 Difference]: Without dead ends: 131 [2022-07-20 05:21:32,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:21:32,449 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:32,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 165 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-07-20 05:21:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-20 05:21:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-07-20 05:21:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 118 states have (on average 1.3728813559322033) internal successors, (162), 127 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) [2022-07-20 05:21:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-07-20 05:21:32,451 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 13 [2022-07-20 05:21:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:32,451 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-07-20 05:21:32,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-07-20 05:21:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:21:32,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:32,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:32,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:32,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:32,652 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1556886882, now seen corresponding path program 1 times [2022-07-20 05:21:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:32,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941489464] [2022-07-20 05:21:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:32,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:32,654 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:32,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 05:21:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:21:32,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:32,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:32,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941489464] [2022-07-20 05:21:32,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941489464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:32,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:32,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:21:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578845894] [2022-07-20 05:21:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:32,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:32,809 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:32,828 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2022-07-20 05:21:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 05:21:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:32,829 INFO L225 Difference]: With dead ends: 129 [2022-07-20 05:21:32,829 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 05:21:32,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:32,830 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:32,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 108 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-07-20 05:21:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 05:21:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2022-07-20 05:21:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 85 states have (on average 1.4) internal successors, (119), 94 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2022-07-20 05:21:32,832 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 13 [2022-07-20 05:21:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:32,833 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2022-07-20 05:21:32,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2022-07-20 05:21:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 05:21:32,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:32,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:32,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:33,042 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 447033770, now seen corresponding path program 1 times [2022-07-20 05:21:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:33,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673499007] [2022-07-20 05:21:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:33,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:33,044 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:33,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 05:21:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:33,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:21:33,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:33,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:33,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:33,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:33,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:34,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673499007] [2022-07-20 05:21:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673499007] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:34,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:34,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-20 05:21:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498274762] [2022-07-20 05:21:34,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:34,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:21:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:21:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:21:34,317 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:35,211 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2022-07-20 05:21:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:21:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 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 14 [2022-07-20 05:21:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:35,213 INFO L225 Difference]: With dead ends: 170 [2022-07-20 05:21:35,213 INFO L226 Difference]: Without dead ends: 170 [2022-07-20 05:21:35,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:21:35,214 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 288 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:35,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 168 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:21:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-20 05:21:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 83. [2022-07-20 05:21:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 82 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2022-07-20 05:21:35,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 14 [2022-07-20 05:21:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:35,217 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2022-07-20 05:21:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2022-07-20 05:21:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:21:35,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:35,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:35,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:35,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:35,424 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2022-07-20 05:21:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:35,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441415900] [2022-07-20 05:21:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:35,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:35,426 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:35,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 05:21:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:35,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:21:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:35,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:35,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:35,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:36,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:36,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441415900] [2022-07-20 05:21:36,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441415900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:36,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:36,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-20 05:21:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347785453] [2022-07-20 05:21:36,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:21:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:21:36,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:21:36,319 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:37,222 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-07-20 05:21:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:21:37,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 05:21:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:37,224 INFO L225 Difference]: With dead ends: 185 [2022-07-20 05:21:37,224 INFO L226 Difference]: Without dead ends: 185 [2022-07-20 05:21:37,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:21:37,225 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 552 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:37,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 208 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:21:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-20 05:21:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 127. [2022-07-20 05:21:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.3949579831932772) internal successors, (166), 126 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-07-20 05:21:37,227 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 15 [2022-07-20 05:21:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-07-20 05:21:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-07-20 05:21:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:21:37,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:37,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:37,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:37,435 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1519675195, now seen corresponding path program 1 times [2022-07-20 05:21:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:37,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420356913] [2022-07-20 05:21:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:37,437 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:37,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 05:21:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:37,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 05:21:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:37,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:37,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:37,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:37,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:37,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420356913] [2022-07-20 05:21:37,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420356913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:37,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:37,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-20 05:21:37,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858526904] [2022-07-20 05:21:37,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:21:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:37,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:21:37,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:21:37,978 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:38,133 INFO L93 Difference]: Finished difference Result 160 states and 209 transitions. [2022-07-20 05:21:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:21:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 05:21:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:38,134 INFO L225 Difference]: With dead ends: 160 [2022-07-20 05:21:38,135 INFO L226 Difference]: Without dead ends: 160 [2022-07-20 05:21:38,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:21:38,135 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:38,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 279 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-20 05:21:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-20 05:21:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2022-07-20 05:21:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.380952380952381) internal successors, (174), 133 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2022-07-20 05:21:38,138 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 15 [2022-07-20 05:21:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:38,138 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2022-07-20 05:21:38,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2022-07-20 05:21:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 05:21:38,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:38,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:38,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-20 05:21:38,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:38,346 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1777840633, now seen corresponding path program 1 times [2022-07-20 05:21:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:38,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336869755] [2022-07-20 05:21:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:38,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:38,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:38,348 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:38,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 05:21:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 05:21:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:38,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:38,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:38,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:38,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:39,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:39,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336869755] [2022-07-20 05:21:39,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336869755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:39,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:39,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-20 05:21:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595841209] [2022-07-20 05:21:39,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:21:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:21:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:21:39,257 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:40,005 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2022-07-20 05:21:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:21:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 05:21:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:40,006 INFO L225 Difference]: With dead ends: 168 [2022-07-20 05:21:40,006 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 05:21:40,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:21:40,007 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 97 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:40,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 314 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-07-20 05:21:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 05:21:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2022-07-20 05:21:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.380952380952381) internal successors, (174), 133 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2022-07-20 05:21:40,010 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 15 [2022-07-20 05:21:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:40,011 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2022-07-20 05:21:40,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2022-07-20 05:21:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:21:40,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:40,011 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:40,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:40,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:40,218 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 151290486, now seen corresponding path program 1 times [2022-07-20 05:21:40,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:40,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706202253] [2022-07-20 05:21:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:40,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:40,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:40,220 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:40,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-20 05:21:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:21:40,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:21:40,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:21:40,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:40,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:41,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:41,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706202253] [2022-07-20 05:21:41,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706202253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:41,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:41,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-20 05:21:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630108373] [2022-07-20 05:21:41,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:41,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:21:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:21:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:21:41,366 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:41,979 INFO L93 Difference]: Finished difference Result 182 states and 236 transitions. [2022-07-20 05:21:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:21:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 05:21:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:41,981 INFO L225 Difference]: With dead ends: 182 [2022-07-20 05:21:41,981 INFO L226 Difference]: Without dead ends: 182 [2022-07-20 05:21:41,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:21:41,982 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:41,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 275 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2022-07-20 05:21:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-20 05:21:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2022-07-20 05:21:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 134 states have (on average 1.373134328358209) internal successors, (184), 141 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 184 transitions. [2022-07-20 05:21:41,984 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 184 transitions. Word has length 16 [2022-07-20 05:21:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:41,985 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 184 transitions. [2022-07-20 05:21:41,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 184 transitions. [2022-07-20 05:21:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:21:41,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:41,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:41,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:42,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:42,192 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2022-07-20 05:21:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:42,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238843558] [2022-07-20 05:21:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:42,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:42,194 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:42,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 05:21:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:21:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:42,264 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 05:21:42,264 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 18 [2022-07-20 05:21:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:42,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:42,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238843558] [2022-07-20 05:21:42,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238843558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:42,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:42,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:21:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848941380] [2022-07-20 05:21:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:42,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:21:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:21:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:21:42,286 INFO L87 Difference]: Start difference. First operand 142 states and 184 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-07-20 05:21:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:42,364 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-07-20 05:21:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:21:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 [2022-07-20 05:21:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:42,365 INFO L225 Difference]: With dead ends: 143 [2022-07-20 05:21:42,365 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 05:21:42,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:21:42,366 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:42,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 05:21:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-07-20 05:21:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 140 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2022-07-20 05:21:42,368 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 17 [2022-07-20 05:21:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:42,369 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2022-07-20 05:21:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-07-20 05:21:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2022-07-20 05:21:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:21:42,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:42,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:42,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:42,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:42,576 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2022-07-20 05:21:42,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:42,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575932206] [2022-07-20 05:21:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:42,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:42,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:42,578 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:42,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-20 05:21:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 05:21:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:42,651 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:42,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:42,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:42,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575932206] [2022-07-20 05:21:42,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575932206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:42,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:42,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:42,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268395989] [2022-07-20 05:21:42,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:42,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:21:42,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:21:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:21:42,698 INFO L87 Difference]: Start difference. First operand 141 states and 181 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) [2022-07-20 05:21:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:42,897 INFO L93 Difference]: Finished difference Result 214 states and 269 transitions. [2022-07-20 05:21:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:21:42,898 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 [2022-07-20 05:21:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:42,899 INFO L225 Difference]: With dead ends: 214 [2022-07-20 05:21:42,899 INFO L226 Difference]: Without dead ends: 214 [2022-07-20 05:21:42,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:21:42,899 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:42,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 161 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:21:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-20 05:21:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 173. [2022-07-20 05:21:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 166 states have (on average 1.3433734939759037) internal successors, (223), 172 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 223 transitions. [2022-07-20 05:21:42,902 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 223 transitions. Word has length 17 [2022-07-20 05:21:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:42,902 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 223 transitions. [2022-07-20 05:21:42,903 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) [2022-07-20 05:21:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 223 transitions. [2022-07-20 05:21:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:21:42,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:42,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:42,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-20 05:21:43,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:43,104 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2022-07-20 05:21:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613392523] [2022-07-20 05:21:43,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:43,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:43,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:43,106 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:43,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-20 05:21:43,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:43,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:43,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:21:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:43,210 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:43,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:43,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:43,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-20 05:21:43,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:21:43,368 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:43,368 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 22 treesize of output 22 [2022-07-20 05:21:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:43,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:44,258 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:44,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:21:44,280 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:44,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:21:44,294 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 9 [2022-07-20 05:21:44,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:44,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:44,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:44,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613392523] [2022-07-20 05:21:44,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613392523] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:44,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:44,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-20 05:21:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903920314] [2022-07-20 05:21:44,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:21:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:21:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=359, Unknown=1, NotChecked=0, Total=420 [2022-07-20 05:21:44,618 INFO L87 Difference]: Start difference. First operand 173 states and 223 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:48,503 INFO L93 Difference]: Finished difference Result 420 states and 510 transitions. [2022-07-20 05:21:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:21:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:21:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:48,504 INFO L225 Difference]: With dead ends: 420 [2022-07-20 05:21:48,504 INFO L226 Difference]: Without dead ends: 420 [2022-07-20 05:21:48,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=554, Invalid=1607, Unknown=1, NotChecked=0, Total=2162 [2022-07-20 05:21:48,505 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 640 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:48,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 489 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 354 Invalid, 0 Unknown, 43 Unchecked, 0.9s Time] [2022-07-20 05:21:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-07-20 05:21:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 181. [2022-07-20 05:21:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.3505747126436782) internal successors, (235), 180 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 235 transitions. [2022-07-20 05:21:48,509 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 235 transitions. Word has length 17 [2022-07-20 05:21:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:48,509 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 235 transitions. [2022-07-20 05:21:48,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 235 transitions. [2022-07-20 05:21:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:21:48,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:48,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:48,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:48,717 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 118982356, now seen corresponding path program 2 times [2022-07-20 05:21:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:48,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385401834] [2022-07-20 05:21:48,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:48,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:48,719 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:48,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-20 05:21:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:48,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:21:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:48,843 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:48,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:48,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:48,966 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 19 treesize of output 15 [2022-07-20 05:21:49,011 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 24 [2022-07-20 05:21:49,110 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:49,110 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 24 treesize of output 24 [2022-07-20 05:21:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:49,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:50,149 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:50,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:21:50,164 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:50,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:21:50,178 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 9 [2022-07-20 05:21:50,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:50,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:50,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385401834] [2022-07-20 05:21:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385401834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:50,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:50,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-20 05:21:50,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977687728] [2022-07-20 05:21:50,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:50,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:21:50,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:21:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=394, Unknown=1, NotChecked=0, Total=462 [2022-07-20 05:21:50,628 INFO L87 Difference]: Start difference. First operand 181 states and 235 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:51,933 INFO L93 Difference]: Finished difference Result 197 states and 251 transitions. [2022-07-20 05:21:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:21:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:21:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:51,935 INFO L225 Difference]: With dead ends: 197 [2022-07-20 05:21:51,935 INFO L226 Difference]: Without dead ends: 197 [2022-07-20 05:21:51,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=122, Invalid=633, Unknown=1, NotChecked=0, Total=756 [2022-07-20 05:21:51,936 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:51,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 434 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-07-20 05:21:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-20 05:21:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 178. [2022-07-20 05:21:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 171 states have (on average 1.3625730994152048) internal successors, (233), 177 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 233 transitions. [2022-07-20 05:21:51,942 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 233 transitions. Word has length 17 [2022-07-20 05:21:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:51,942 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 233 transitions. [2022-07-20 05:21:51,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 233 transitions. [2022-07-20 05:21:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:21:51,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:51,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:51,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-20 05:21:52,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:52,150 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:52,150 INFO L85 PathProgramCache]: Analyzing trace with hash -305374680, now seen corresponding path program 1 times [2022-07-20 05:21:52,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:52,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27884979] [2022-07-20 05:21:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:21:52,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:52,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:52,151 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:52,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-20 05:21:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:21:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 05:21:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:52,237 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:52,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:52,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:21:52,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:52,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27884979] [2022-07-20 05:21:52,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27884979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:21:52,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:21:52,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:21:52,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678188075] [2022-07-20 05:21:52,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:21:52,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:21:52,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:21:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:21:52,288 INFO L87 Difference]: Start difference. First operand 178 states and 233 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) [2022-07-20 05:21:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:21:52,451 INFO L93 Difference]: Finished difference Result 201 states and 261 transitions. [2022-07-20 05:21:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:21:52,452 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 [2022-07-20 05:21:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:21:52,452 INFO L225 Difference]: With dead ends: 201 [2022-07-20 05:21:52,452 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 05:21:52,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:21:52,453 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:21:52,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 84 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:21:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 05:21:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 159. [2022-07-20 05:21:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 152 states have (on average 1.355263157894737) internal successors, (206), 158 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) [2022-07-20 05:21:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2022-07-20 05:21:52,456 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 17 [2022-07-20 05:21:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:21:52,456 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2022-07-20 05:21:52,456 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) [2022-07-20 05:21:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2022-07-20 05:21:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:21:52,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:21:52,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:21:52,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:21:52,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:21:52,663 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:21:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:21:52,663 INFO L85 PathProgramCache]: Analyzing trace with hash -892134894, now seen corresponding path program 2 times [2022-07-20 05:21:52,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:21:52,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310187793] [2022-07-20 05:21:52,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:21:52,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:21:52,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:21:52,665 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:21:52,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-20 05:21:52,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:21:52,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:21:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 05:21:52,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:21:52,791 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:21:52,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:21:52,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:53,055 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 19 treesize of output 15 [2022-07-20 05:21:53,137 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 24 [2022-07-20 05:21:53,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:53,310 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 24 treesize of output 24 [2022-07-20 05:21:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:53,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:21:54,677 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:54,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:21:54,692 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:21:54,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-20 05:21:54,700 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 9 [2022-07-20 05:21:55,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:21:55,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:21:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:21:55,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:21:55,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310187793] [2022-07-20 05:21:55,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310187793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:21:55,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:21:55,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-20 05:21:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597684146] [2022-07-20 05:21:55,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:21:55,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:21:55,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:21:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:21:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=551, Unknown=1, NotChecked=0, Total=650 [2022-07-20 05:21:55,600 INFO L87 Difference]: Start difference. First operand 159 states and 206 transitions. Second operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:21:58,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 05:22:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:02,501 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2022-07-20 05:22:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:22:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:22:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:02,510 INFO L225 Difference]: With dead ends: 235 [2022-07-20 05:22:02,511 INFO L226 Difference]: Without dead ends: 235 [2022-07-20 05:22:02,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=322, Invalid=1657, Unknown=1, NotChecked=0, Total=1980 [2022-07-20 05:22:02,511 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 222 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:02,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 322 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 307 Invalid, 1 Unknown, 160 Unchecked, 3.3s Time] [2022-07-20 05:22:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-20 05:22:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 151. [2022-07-20 05:22:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.375) internal successors, (198), 150 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-07-20 05:22:02,515 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 17 [2022-07-20 05:22:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:02,523 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-07-20 05:22:02,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-07-20 05:22:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:22:02,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:02,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:02,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:02,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:02,731 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-20 05:22:02,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674364501] [2022-07-20 05:22:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:02,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:02,733 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:02,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-20 05:22:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:22:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:02,795 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:02,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:22:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:02,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:03,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674364501] [2022-07-20 05:22:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674364501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:03,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:03,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-07-20 05:22:03,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491070816] [2022-07-20 05:22:03,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:03,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:22:03,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:22:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:22:03,329 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:04,010 INFO L93 Difference]: Finished difference Result 276 states and 360 transitions. [2022-07-20 05:22:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:22:04,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:22:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:04,012 INFO L225 Difference]: With dead ends: 276 [2022-07-20 05:22:04,012 INFO L226 Difference]: Without dead ends: 276 [2022-07-20 05:22:04,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:22:04,013 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 362 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:04,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 160 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:22:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-20 05:22:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 146. [2022-07-20 05:22:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.3571428571428572) internal successors, (190), 145 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2022-07-20 05:22:04,019 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 18 [2022-07-20 05:22:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:04,020 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2022-07-20 05:22:04,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2022-07-20 05:22:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 05:22:04,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:04,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:04,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:04,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:04,227 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1622072275, now seen corresponding path program 3 times [2022-07-20 05:22:04,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:04,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923823503] [2022-07-20 05:22:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:22:04,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:04,228 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:04,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-20 05:22:04,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:22:04,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 05:22:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:04,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:04,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:22:04,526 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 56 treesize of output 44 [2022-07-20 05:22:04,535 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 17 treesize of output 13 [2022-07-20 05:22:04,613 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 20 treesize of output 22 [2022-07-20 05:22:04,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:04,758 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:04,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-07-20 05:22:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:22:04,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:04,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:04,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923823503] [2022-07-20 05:22:04,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923823503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:04,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:04,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:22:04,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963833091] [2022-07-20 05:22:04,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:04,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:22:04,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:04,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:22:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:22:04,777 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-07-20 05:22:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:05,072 INFO L93 Difference]: Finished difference Result 169 states and 212 transitions. [2022-07-20 05:22:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:22:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 19 [2022-07-20 05:22:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:05,074 INFO L225 Difference]: With dead ends: 169 [2022-07-20 05:22:05,074 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 05:22:05,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:22:05,075 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:05,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 176 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-20 05:22:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 05:22:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2022-07-20 05:22:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 159 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2022-07-20 05:22:05,077 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 19 [2022-07-20 05:22:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:05,077 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2022-07-20 05:22:05,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-07-20 05:22:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2022-07-20 05:22:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 05:22:05,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:05,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:05,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-20 05:22:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:05,285 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:05,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1651826667, now seen corresponding path program 3 times [2022-07-20 05:22:05,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:05,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273729547] [2022-07-20 05:22:05,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:22:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:05,287 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:05,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-20 05:22:05,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:22:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:05,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:22:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:05,426 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:05,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:22:05,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:05,636 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 71 treesize of output 55 [2022-07-20 05:22:05,654 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 17 treesize of output 13 [2022-07-20 05:22:05,724 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 20 treesize of output 22 [2022-07-20 05:22:05,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:05,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:05,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-07-20 05:22:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:22:05,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:05,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:05,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273729547] [2022-07-20 05:22:05,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273729547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:05,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:05,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:22:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274848442] [2022-07-20 05:22:05,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:22:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:22:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:22:05,874 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-07-20 05:22:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:06,228 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-07-20 05:22:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:22:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 19 [2022-07-20 05:22:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:06,229 INFO L225 Difference]: With dead ends: 174 [2022-07-20 05:22:06,229 INFO L226 Difference]: Without dead ends: 174 [2022-07-20 05:22:06,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:22:06,230 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:06,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 217 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-07-20 05:22:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-20 05:22:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2022-07-20 05:22:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 159 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2022-07-20 05:22:06,232 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 19 [2022-07-20 05:22:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:06,232 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2022-07-20 05:22:06,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-07-20 05:22:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2022-07-20 05:22:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:22:06,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:06,232 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:06,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:06,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:06,433 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash 359108793, now seen corresponding path program 2 times [2022-07-20 05:22:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:06,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429297937] [2022-07-20 05:22:06,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:22:06,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:06,436 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:06,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-20 05:22:06,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:22:06,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:06,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:22:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:06,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:06,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:22:06,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:07,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:08,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:08,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:08,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429297937] [2022-07-20 05:22:08,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429297937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:08,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:08,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-20 05:22:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668376993] [2022-07-20 05:22:08,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:22:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:08,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:22:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:22:08,578 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:14,120 INFO L93 Difference]: Finished difference Result 608 states and 778 transitions. [2022-07-20 05:22:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 05:22:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 05:22:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:14,124 INFO L225 Difference]: With dead ends: 608 [2022-07-20 05:22:14,124 INFO L226 Difference]: Without dead ends: 608 [2022-07-20 05:22:14,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:22:14,124 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 742 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:14,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 502 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 401 Invalid, 0 Unknown, 66 Unchecked, 2.8s Time] [2022-07-20 05:22:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-07-20 05:22:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 216. [2022-07-20 05:22:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.3047619047619048) internal successors, (274), 215 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 274 transitions. [2022-07-20 05:22:14,129 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 274 transitions. Word has length 20 [2022-07-20 05:22:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:14,129 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 274 transitions. [2022-07-20 05:22:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 274 transitions. [2022-07-20 05:22:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:22:14,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:14,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:14,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:14,337 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1184909859, now seen corresponding path program 1 times [2022-07-20 05:22:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:14,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515738232] [2022-07-20 05:22:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:14,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:14,339 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:14,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-20 05:22:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:14,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:22:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:22:14,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:14,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:14,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515738232] [2022-07-20 05:22:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515738232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:14,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:14,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:22:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90841258] [2022-07-20 05:22:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:14,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:22:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:22:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:22:14,452 INFO L87 Difference]: Start difference. First operand 216 states and 274 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:14,503 INFO L93 Difference]: Finished difference Result 220 states and 273 transitions. [2022-07-20 05:22:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:22:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 05:22:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:14,504 INFO L225 Difference]: With dead ends: 220 [2022-07-20 05:22:14,504 INFO L226 Difference]: Without dead ends: 220 [2022-07-20 05:22:14,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:22:14,504 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:14,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:22:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-20 05:22:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 210. [2022-07-20 05:22:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.2843137254901962) internal successors, (262), 209 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 262 transitions. [2022-07-20 05:22:14,506 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 262 transitions. Word has length 21 [2022-07-20 05:22:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:14,507 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 262 transitions. [2022-07-20 05:22:14,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 262 transitions. [2022-07-20 05:22:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:22:14,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:14,507 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] [2022-07-20 05:22:14,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:14,714 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:14,714 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2022-07-20 05:22:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:14,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890114728] [2022-07-20 05:22:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:14,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:14,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:14,716 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:14,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-20 05:22:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:14,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:22:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:14,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:14,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:14,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890114728] [2022-07-20 05:22:14,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890114728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:14,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:14,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-20 05:22:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515636203] [2022-07-20 05:22:14,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:22:14,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:22:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:22:14,826 INFO L87 Difference]: Start difference. First operand 210 states and 262 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:14,884 INFO L93 Difference]: Finished difference Result 240 states and 290 transitions. [2022-07-20 05:22:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:22:14,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:22:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:14,885 INFO L225 Difference]: With dead ends: 240 [2022-07-20 05:22:14,885 INFO L226 Difference]: Without dead ends: 240 [2022-07-20 05:22:14,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:22:14,886 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 58 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:14,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 210 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:22:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-20 05:22:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2022-07-20 05:22:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.2697674418604652) internal successors, (273), 220 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 273 transitions. [2022-07-20 05:22:14,888 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 273 transitions. Word has length 23 [2022-07-20 05:22:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:14,888 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 273 transitions. [2022-07-20 05:22:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 273 transitions. [2022-07-20 05:22:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:22:14,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:14,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:14,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:15,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:15,096 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash 445238026, now seen corresponding path program 1 times [2022-07-20 05:22:15,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:15,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065907752] [2022-07-20 05:22:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:15,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:15,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:15,098 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:15,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-20 05:22:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:15,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 05:22:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:15,196 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:15,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:22:15,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:15,424 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 19 treesize of output 15 [2022-07-20 05:22:15,499 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 24 [2022-07-20 05:22:15,703 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:15,703 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 24 treesize of output 24 [2022-07-20 05:22:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:16,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:17,019 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:17,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-20 05:22:17,054 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:17,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-20 05:22:17,072 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 13 treesize of output 9 [2022-07-20 05:22:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:18,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:18,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:18,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065907752] [2022-07-20 05:22:18,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065907752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:18,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:18,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-20 05:22:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040744065] [2022-07-20 05:22:18,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:18,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 05:22:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 05:22:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2022-07-20 05:22:18,636 INFO L87 Difference]: Start difference. First operand 221 states and 273 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:20,010 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2022-07-20 05:22:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:22:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:22:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:20,013 INFO L225 Difference]: With dead ends: 276 [2022-07-20 05:22:20,013 INFO L226 Difference]: Without dead ends: 276 [2022-07-20 05:22:20,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=126, Invalid=685, Unknown=1, NotChecked=0, Total=812 [2022-07-20 05:22:20,013 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 248 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:20,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 436 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 69 Unchecked, 0.7s Time] [2022-07-20 05:22:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-20 05:22:20,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 223. [2022-07-20 05:22:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.271889400921659) internal successors, (276), 222 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 276 transitions. [2022-07-20 05:22:20,017 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 276 transitions. Word has length 23 [2022-07-20 05:22:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:20,017 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 276 transitions. [2022-07-20 05:22:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 276 transitions. [2022-07-20 05:22:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:22:20,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:20,018 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] [2022-07-20 05:22:20,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-20 05:22:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:20,218 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:20,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2022-07-20 05:22:20,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:20,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927720296] [2022-07-20 05:22:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:20,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:20,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:20,220 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:20,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-20 05:22:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:22:20,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:20,309 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 12 treesize of output 8 [2022-07-20 05:22:20,344 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 17 treesize of output 9 [2022-07-20 05:22:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:20,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:20,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:20,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927720296] [2022-07-20 05:22:20,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927720296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:20,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:20,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:22:20,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830922249] [2022-07-20 05:22:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:20,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:22:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:22:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:22:20,361 INFO L87 Difference]: Start difference. First operand 223 states and 276 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:20,522 INFO L93 Difference]: Finished difference Result 288 states and 349 transitions. [2022-07-20 05:22:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:22:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:22:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:20,524 INFO L225 Difference]: With dead ends: 288 [2022-07-20 05:22:20,524 INFO L226 Difference]: Without dead ends: 288 [2022-07-20 05:22:20,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:22:20,524 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:20,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 260 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:22:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-20 05:22:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 214. [2022-07-20 05:22:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.2644230769230769) internal successors, (263), 213 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 263 transitions. [2022-07-20 05:22:20,527 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 263 transitions. Word has length 23 [2022-07-20 05:22:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:20,527 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 263 transitions. [2022-07-20 05:22:20,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 263 transitions. [2022-07-20 05:22:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:22:20,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:20,528 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] [2022-07-20 05:22:20,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:20,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:20,735 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2022-07-20 05:22:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006006228] [2022-07-20 05:22:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:20,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:20,737 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:20,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-20 05:22:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 05:22:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:20,822 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:20,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:22:20,850 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 17 treesize of output 13 [2022-07-20 05:22:20,949 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:20,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:22:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:21,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:21,667 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 16 treesize of output 14 [2022-07-20 05:22:21,672 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 29 treesize of output 27 [2022-07-20 05:22:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:21,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:21,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006006228] [2022-07-20 05:22:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006006228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:21,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:21,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-20 05:22:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123066541] [2022-07-20 05:22:21,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:22:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:22:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:22:21,836 INFO L87 Difference]: Start difference. First operand 214 states and 263 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:23,078 INFO L93 Difference]: Finished difference Result 234 states and 286 transitions. [2022-07-20 05:22:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:22:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-07-20 05:22:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:23,080 INFO L225 Difference]: With dead ends: 234 [2022-07-20 05:22:23,080 INFO L226 Difference]: Without dead ends: 234 [2022-07-20 05:22:23,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:22:23,081 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:23,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 291 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:22:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-20 05:22:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 219. [2022-07-20 05:22:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.267605633802817) internal successors, (270), 218 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 270 transitions. [2022-07-20 05:22:23,083 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 270 transitions. Word has length 23 [2022-07-20 05:22:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:23,083 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 270 transitions. [2022-07-20 05:22:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 270 transitions. [2022-07-20 05:22:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 05:22:23,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:23,084 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] [2022-07-20 05:22:23,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:23,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:23,291 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2055315217, now seen corresponding path program 1 times [2022-07-20 05:22:23,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:23,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574800554] [2022-07-20 05:22:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:23,294 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:23,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-20 05:22:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 05:22:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:23,759 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 15 treesize of output 11 [2022-07-20 05:22:24,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:24,253 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:24,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-07-20 05:22:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:24,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:24,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:24,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574800554] [2022-07-20 05:22:24,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574800554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:24,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:24,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-20 05:22:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213220522] [2022-07-20 05:22:24,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:24,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:22:24,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:22:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:22:24,482 INFO L87 Difference]: Start difference. First operand 219 states and 270 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:24,892 INFO L93 Difference]: Finished difference Result 237 states and 288 transitions. [2022-07-20 05:22:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:22:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-20 05:22:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:24,893 INFO L225 Difference]: With dead ends: 237 [2022-07-20 05:22:24,893 INFO L226 Difference]: Without dead ends: 237 [2022-07-20 05:22:24,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:22:24,894 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:24,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 189 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-07-20 05:22:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-20 05:22:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2022-07-20 05:22:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.2864321608040201) internal successors, (256), 204 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 256 transitions. [2022-07-20 05:22:24,896 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 256 transitions. Word has length 24 [2022-07-20 05:22:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:24,896 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 256 transitions. [2022-07-20 05:22:24,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 256 transitions. [2022-07-20 05:22:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:22:24,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:24,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:24,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-07-20 05:22:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:25,104 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2045687839, now seen corresponding path program 1 times [2022-07-20 05:22:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:25,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175288707] [2022-07-20 05:22:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:25,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:25,106 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:25,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-20 05:22:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:22:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:25,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-20 05:22:25,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:25,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:26,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:26,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175288707] [2022-07-20 05:22:26,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175288707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:26,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:26,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-20 05:22:26,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561382941] [2022-07-20 05:22:26,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:26,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 05:22:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 05:22:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:22:26,892 INFO L87 Difference]: Start difference. First operand 205 states and 256 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:32,017 INFO L93 Difference]: Finished difference Result 534 states and 621 transitions. [2022-07-20 05:22:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:22:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 05:22:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:32,019 INFO L225 Difference]: With dead ends: 534 [2022-07-20 05:22:32,019 INFO L226 Difference]: Without dead ends: 528 [2022-07-20 05:22:32,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=514, Invalid=1648, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:22:32,020 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 846 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:32,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 710 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 05:22:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-20 05:22:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 257. [2022-07-20 05:22:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.2749003984063745) internal successors, (320), 256 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 320 transitions. [2022-07-20 05:22:32,024 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 320 transitions. Word has length 25 [2022-07-20 05:22:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:32,024 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 320 transitions. [2022-07-20 05:22:32,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 320 transitions. [2022-07-20 05:22:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:22:32,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:32,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:32,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:32,232 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2022-07-20 05:22:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:32,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334180415] [2022-07-20 05:22:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:32,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:32,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:32,234 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:32,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-20 05:22:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:22:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:34,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:34,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:34,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334180415] [2022-07-20 05:22:34,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334180415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:34,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:34,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:22:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401392394] [2022-07-20 05:22:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:34,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:22:34,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:22:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-20 05:22:34,426 INFO L87 Difference]: Start difference. First operand 257 states and 320 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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) [2022-07-20 05:22:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:34,437 INFO L93 Difference]: Finished difference Result 271 states and 334 transitions. [2022-07-20 05:22:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:22:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 05:22:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:34,438 INFO L225 Difference]: With dead ends: 271 [2022-07-20 05:22:34,438 INFO L226 Difference]: Without dead ends: 268 [2022-07-20 05:22:34,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-20 05:22:34,439 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:34,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 92 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-20 05:22:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-20 05:22:34,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-07-20 05:22:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.264367816091954) internal successors, (330), 266 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2022-07-20 05:22:34,441 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 25 [2022-07-20 05:22:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:34,441 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2022-07-20 05:22:34,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 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) [2022-07-20 05:22:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2022-07-20 05:22:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:22:34,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:34,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:34,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:34,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:34,649 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1622986013, now seen corresponding path program 2 times [2022-07-20 05:22:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453154545] [2022-07-20 05:22:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:22:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:34,651 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-20 05:22:34,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:22:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:22:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-20 05:22:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:34,778 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:34,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:22:34,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:35,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-20 05:22:35,250 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 24 [2022-07-20 05:22:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:35,469 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 23 treesize of output 9 [2022-07-20 05:22:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:22:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:36,835 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:36,835 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 28 treesize of output 29 [2022-07-20 05:22:36,853 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:36,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-20 05:22:36,869 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 13 treesize of output 9 [2022-07-20 05:22:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:38,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:38,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453154545] [2022-07-20 05:22:38,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453154545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:38,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:38,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-07-20 05:22:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864383827] [2022-07-20 05:22:38,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:38,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 05:22:38,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 05:22:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=611, Unknown=1, NotChecked=0, Total=702 [2022-07-20 05:22:38,119 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:52,487 INFO L93 Difference]: Finished difference Result 523 states and 597 transitions. [2022-07-20 05:22:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 05:22:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 05:22:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:52,489 INFO L225 Difference]: With dead ends: 523 [2022-07-20 05:22:52,489 INFO L226 Difference]: Without dead ends: 523 [2022-07-20 05:22:52,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=609, Invalid=4220, Unknown=1, NotChecked=0, Total=4830 [2022-07-20 05:22:52,490 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 359 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:52,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1681 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 945 Invalid, 0 Unknown, 235 Unchecked, 3.7s Time] [2022-07-20 05:22:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-20 05:22:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 281. [2022-07-20 05:22:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 275 states have (on average 1.269090909090909) internal successors, (349), 280 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 349 transitions. [2022-07-20 05:22:52,493 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 349 transitions. Word has length 25 [2022-07-20 05:22:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:52,494 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 349 transitions. [2022-07-20 05:22:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 349 transitions. [2022-07-20 05:22:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:22:52,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:52,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:52,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-07-20 05:22:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:52,701 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -71391224, now seen corresponding path program 1 times [2022-07-20 05:22:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648346247] [2022-07-20 05:22:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:52,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:52,703 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:52,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-20 05:22:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:22:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:52,785 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 12 treesize of output 8 [2022-07-20 05:22:52,834 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 17 treesize of output 9 [2022-07-20 05:22:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:52,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:22:52,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:52,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648346247] [2022-07-20 05:22:52,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648346247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:22:52,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:22:52,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:22:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895943736] [2022-07-20 05:22:52,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:22:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:22:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:22:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:22:52,851 INFO L87 Difference]: Start difference. First operand 281 states and 349 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:52,896 INFO L93 Difference]: Finished difference Result 284 states and 351 transitions. [2022-07-20 05:22:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:22:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:22:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:52,898 INFO L225 Difference]: With dead ends: 284 [2022-07-20 05:22:52,898 INFO L226 Difference]: Without dead ends: 269 [2022-07-20 05:22:52,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:22:52,898 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:52,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-07-20 05:22:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-20 05:22:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-07-20 05:22:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 263 states have (on average 1.2699619771863118) internal successors, (334), 268 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 334 transitions. [2022-07-20 05:22:52,901 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 334 transitions. Word has length 26 [2022-07-20 05:22:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:52,901 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 334 transitions. [2022-07-20 05:22:52,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 334 transitions. [2022-07-20 05:22:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:22:52,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:52,902 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:52,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-20 05:22:53,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:53,108 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:53,109 INFO L85 PathProgramCache]: Analyzing trace with hash -750442950, now seen corresponding path program 1 times [2022-07-20 05:22:53,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:53,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365001847] [2022-07-20 05:22:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:53,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:53,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:53,110 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:53,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-20 05:22:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 05:22:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:22:53,220 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:22:53,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:22:53,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:22:53,578 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 19 treesize of output 15 [2022-07-20 05:22:53,658 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 24 [2022-07-20 05:22:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:53,896 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 24 treesize of output 9 [2022-07-20 05:22:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:22:53,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:22:55,446 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:55,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-20 05:22:55,467 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:22:55,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-20 05:22:55,476 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 13 treesize of output 9 [2022-07-20 05:22:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:22:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:22:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:22:56,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:22:56,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365001847] [2022-07-20 05:22:56,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365001847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:22:56,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:22:56,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 28 [2022-07-20 05:22:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971447136] [2022-07-20 05:22:56,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:22:56,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 05:22:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:22:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 05:22:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=659, Unknown=1, NotChecked=0, Total=756 [2022-07-20 05:22:56,972 INFO L87 Difference]: Start difference. First operand 269 states and 334 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:22:59,106 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2022-07-20 05:22:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:22:59,108 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 05:22:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:22:59,109 INFO L225 Difference]: With dead ends: 264 [2022-07-20 05:22:59,109 INFO L226 Difference]: Without dead ends: 264 [2022-07-20 05:22:59,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=146, Invalid=909, Unknown=1, NotChecked=0, Total=1056 [2022-07-20 05:22:59,110 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:22:59,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 454 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 257 Invalid, 0 Unknown, 59 Unchecked, 1.1s Time] [2022-07-20 05:22:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-20 05:22:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 251. [2022-07-20 05:22:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2530612244897958) internal successors, (307), 250 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 307 transitions. [2022-07-20 05:22:59,112 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 307 transitions. Word has length 27 [2022-07-20 05:22:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:22:59,113 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 307 transitions. [2022-07-20 05:22:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:22:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 307 transitions. [2022-07-20 05:22:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 05:22:59,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:22:59,113 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:22:59,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-07-20 05:22:59,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:22:59,314 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:22:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:22:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -284268204, now seen corresponding path program 1 times [2022-07-20 05:22:59,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:22:59,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705364733] [2022-07-20 05:22:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:22:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:22:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:22:59,315 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:22:59,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-20 05:22:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:22:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 05:22:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:23:00,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:01,111 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 26 treesize of output 22 [2022-07-20 05:23:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:23:01,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:23:01,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705364733] [2022-07-20 05:23:01,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705364733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:01,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:23:01,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-20 05:23:01,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643168383] [2022-07-20 05:23:01,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:01,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:23:01,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:23:01,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:23:01,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:23:01,774 INFO L87 Difference]: Start difference. First operand 251 states and 307 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:02,163 INFO L93 Difference]: Finished difference Result 287 states and 347 transitions. [2022-07-20 05:23:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:23:02,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 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 28 [2022-07-20 05:23:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:02,165 INFO L225 Difference]: With dead ends: 287 [2022-07-20 05:23:02,165 INFO L226 Difference]: Without dead ends: 287 [2022-07-20 05:23:02,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:23:02,166 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:02,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 266 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-07-20 05:23:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-20 05:23:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 259. [2022-07-20 05:23:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.2529644268774704) internal successors, (317), 258 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 317 transitions. [2022-07-20 05:23:02,169 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 317 transitions. Word has length 28 [2022-07-20 05:23:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:02,169 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 317 transitions. [2022-07-20 05:23:02,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 317 transitions. [2022-07-20 05:23:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 05:23:02,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:02,169 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, 1, 1, 1, 1, 1] [2022-07-20 05:23:02,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:02,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:23:02,370 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -284277240, now seen corresponding path program 1 times [2022-07-20 05:23:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:23:02,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614406027] [2022-07-20 05:23:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:23:02,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:23:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:23:02,372 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:23:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-07-20 05:23:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:23:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:23:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:02,464 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:02,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:23:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:02,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:23:03,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:23:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614406027] [2022-07-20 05:23:03,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614406027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:03,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:23:03,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-20 05:23:03,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019521681] [2022-07-20 05:23:03,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:03,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 05:23:03,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:23:03,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 05:23:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:23:03,003 INFO L87 Difference]: Start difference. First operand 259 states and 317 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:23:03,586 INFO L93 Difference]: Finished difference Result 369 states and 449 transitions. [2022-07-20 05:23:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:23:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-20 05:23:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:23:03,588 INFO L225 Difference]: With dead ends: 369 [2022-07-20 05:23:03,588 INFO L226 Difference]: Without dead ends: 368 [2022-07-20 05:23:03,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:23:03,588 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 249 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:23:03,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 169 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:23:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-20 05:23:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 277. [2022-07-20 05:23:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.2583025830258303) internal successors, (341), 276 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2022-07-20 05:23:03,592 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 28 [2022-07-20 05:23:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:23:03,592 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2022-07-20 05:23:03,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2022-07-20 05:23:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:23:03,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:23:03,593 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:23:03,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-07-20 05:23:03,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 05:23:03,802 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-20 05:23:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:23:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 2 times [2022-07-20 05:23:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 05:23:03,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176780710] [2022-07-20 05:23:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:23:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 05:23:03,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 05:23:03,803 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 05:23:03,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-20 05:23:03,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:23:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:23:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:23:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:23:03,927 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:23:03,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-20 05:23:03,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:23:04,111 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 17 treesize of output 13 [2022-07-20 05:23:04,145 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 20 treesize of output 22 [2022-07-20 05:23:04,286 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:04,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:23:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:23:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:23:05,631 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:05,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-20 05:23:05,647 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:23:05,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-20 05:23:05,661 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 13 treesize of output 9 [2022-07-20 05:23:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:23:06,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:23:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:23:06,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 05:23:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176780710] [2022-07-20 05:23:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176780710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:23:06,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:23:06,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2022-07-20 05:23:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908607321] [2022-07-20 05:23:06,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:23:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 05:23:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 05:23:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 05:23:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=612, Unknown=1, NotChecked=0, Total=702 [2022-07-20 05:23:06,209 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:23:11,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []