./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/cstrlen-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 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 05:59:19,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 05:59:19,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 05:59:19,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 05:59:19,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 05:59:19,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 05:59:19,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 05:59:19,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 05:59:19,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 05:59:19,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 05:59:19,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 05:59:19,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 05:59:19,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 05:59:19,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 05:59:19,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 05:59:19,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 05:59:19,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 05:59:19,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 05:59:19,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 05:59:19,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 05:59:19,333 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 05:59:19,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 05:59:19,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 05:59:19,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 05:59:19,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 05:59:19,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 05:59:19,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 05:59:19,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 05:59:19,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 05:59:19,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 05:59:19,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 05:59:19,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 05:59:19,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 05:59:19,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 05:59:19,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 05:59:19,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 05:59:19,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 05:59:19,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 05:59:19,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 05:59:19,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 05:59:19,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 05:59:19,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 05:59:19,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 05:59:19,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 05:59:19,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 05:59:19,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 05:59:19,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 05:59:19,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 05:59:19,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 05:59:19,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 05:59:19,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 05:59:19,390 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 05:59:19,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 05:59:19,391 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 05:59:19,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 05:59:19,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 05:59:19,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 05:59:19,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 05:59:19,392 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 05:59:19,392 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 05:59:19,392 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 05:59:19,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 05:59:19,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 05:59:19,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 05:59:19,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 05:59:19,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 05:59:19,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 05:59:19,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 05:59:19,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:59:19,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 05:59:19,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 05:59:19,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 05:59:19,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 05:59:19,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2022-07-14 05:59:19,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 05:59:19,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 05:59:19,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 05:59:19,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 05:59:19,666 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 05:59:19,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-07-14 05:59:19,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8656f3f9/1b68b610af8844629732966e8432c2c5/FLAG797bd7a2e [2022-07-14 05:59:20,166 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 05:59:20,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-07-14 05:59:20,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8656f3f9/1b68b610af8844629732966e8432c2c5/FLAG797bd7a2e [2022-07-14 05:59:20,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8656f3f9/1b68b610af8844629732966e8432c2c5 [2022-07-14 05:59:20,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 05:59:20,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 05:59:20,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 05:59:20,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 05:59:20,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 05:59:20,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:20,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57821d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20, skipping insertion in model container [2022-07-14 05:59:20,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:20,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 05:59:20,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 05:59:20,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:59:20,868 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 05:59:20,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:59:20,946 INFO L208 MainTranslator]: Completed translation [2022-07-14 05:59:20,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20 WrapperNode [2022-07-14 05:59:20,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 05:59:20,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 05:59:20,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 05:59:20,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 05:59:20,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:20,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:20,995 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-07-14 05:59:20,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 05:59:20,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 05:59:20,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 05:59:20,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 05:59:21,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 05:59:21,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 05:59:21,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 05:59:21,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 05:59:21,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (1/1) ... [2022-07-14 05:59:21,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:59:21,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:21,086 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) [2022-07-14 05:59:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 05:59:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 05:59:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 05:59:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 05:59:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 05:59:21,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 05:59:21,111 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 [2022-07-14 05:59:21,206 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 05:59:21,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 05:59:21,376 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 05:59:21,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 05:59:21,381 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 05:59:21,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:59:21 BoogieIcfgContainer [2022-07-14 05:59:21,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 05:59:21,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 05:59:21,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 05:59:21,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 05:59:21,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 05:59:20" (1/3) ... [2022-07-14 05:59:21,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7871df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:59:21, skipping insertion in model container [2022-07-14 05:59:21,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:20" (2/3) ... [2022-07-14 05:59:21,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7871df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:59:21, skipping insertion in model container [2022-07-14 05:59:21,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:59:21" (3/3) ... [2022-07-14 05:59:21,390 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2022-07-14 05:59:21,401 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 05:59:21,402 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-07-14 05:59:21,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 05:59:21,440 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@1e4f6088, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1761f100 [2022-07-14 05:59:21,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-14 05:59:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 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) [2022-07-14 05:59:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 05:59:21,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:21,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 05:59:21,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-14 05:59:21,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:21,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81338550] [2022-07-14 05:59:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81338550] [2022-07-14 05:59:21,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81338550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:21,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:21,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943825501] [2022-07-14 05:59:21,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:21,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:21,702 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 23 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:21,771 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-14 05:59:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 05:59:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:21,781 INFO L225 Difference]: With dead ends: 40 [2022-07-14 05:59:21,781 INFO L226 Difference]: Without dead ends: 36 [2022-07-14 05:59:21,783 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 [2022-07-14 05:59:21,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:21,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-14 05:59:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2022-07-14 05:59:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 23 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) [2022-07-14 05:59:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-14 05:59:21,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 6 [2022-07-14 05:59:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:21,828 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-14 05:59:21,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-14 05:59:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 05:59:21,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:21,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 05:59:21,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 05:59:21,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-07-14 05:59:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504845283] [2022-07-14 05:59:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:21,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504845283] [2022-07-14 05:59:21,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504845283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:21,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:21,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:59:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641594034] [2022-07-14 05:59:21,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:21,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:59:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:59:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:59:21,889 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:21,915 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-14 05:59:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:59:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 05:59:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:21,918 INFO L225 Difference]: With dead ends: 22 [2022-07-14 05:59:21,918 INFO L226 Difference]: Without dead ends: 22 [2022-07-14 05:59:21,920 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 [2022-07-14 05:59:21,923 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:21,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-14 05:59:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-14 05:59:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 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) [2022-07-14 05:59:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-14 05:59:21,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2022-07-14 05:59:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:21,929 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-14 05:59:21,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-14 05:59:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 05:59:21,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:21,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 05:59:21,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 05:59:21,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-07-14 05:59:21,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:21,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170666133] [2022-07-14 05:59:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:21,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:21,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170666133] [2022-07-14 05:59:21,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170666133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:21,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:21,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:21,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535857948] [2022-07-14 05:59:21,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:21,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:21,983 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:22,000 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-07-14 05:59:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 05:59:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:22,001 INFO L225 Difference]: With dead ends: 21 [2022-07-14 05:59:22,001 INFO L226 Difference]: Without dead ends: 21 [2022-07-14 05:59:22,002 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 [2022-07-14 05:59:22,003 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:22,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-14 05:59:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-14 05:59:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 20 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) [2022-07-14 05:59:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-14 05:59:22,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-07-14 05:59:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:22,006 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-14 05:59:22,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-14 05:59:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 05:59:22,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:22,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 05:59:22,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 05:59:22,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:22,009 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-14 05:59:22,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:22,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237478623] [2022-07-14 05:59:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:22,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237478623] [2022-07-14 05:59:22,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237478623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:22,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:22,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347732669] [2022-07-14 05:59:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 05:59:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 05:59:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:22,067 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:22,095 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-07-14 05:59:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 05:59:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:22,096 INFO L225 Difference]: With dead ends: 35 [2022-07-14 05:59:22,096 INFO L226 Difference]: Without dead ends: 35 [2022-07-14 05:59:22,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:22,098 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:22,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-14 05:59:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2022-07-14 05:59:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 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) [2022-07-14 05:59:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-14 05:59:22,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2022-07-14 05:59:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:22,102 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-14 05:59:22,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-14 05:59:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 05:59:22,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:22,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:22,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 05:59:22,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-07-14 05:59:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296078057] [2022-07-14 05:59:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296078057] [2022-07-14 05:59:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296078057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:22,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:22,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:22,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494663400] [2022-07-14 05:59:22,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:22,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:22,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:22,153 INFO L87 Difference]: Start difference. First operand 23 states and 26 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) [2022-07-14 05:59:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:22,188 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-07-14 05:59:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:22,189 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 [2022-07-14 05:59:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:22,191 INFO L225 Difference]: With dead ends: 22 [2022-07-14 05:59:22,191 INFO L226 Difference]: Without dead ends: 22 [2022-07-14 05:59:22,191 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 [2022-07-14 05:59:22,195 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:22,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-14 05:59:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-14 05:59:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 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) [2022-07-14 05:59:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-14 05:59:22,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-07-14 05:59:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:22,206 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-14 05:59:22,206 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) [2022-07-14 05:59:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-14 05:59:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 05:59:22,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:22,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:22,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 05:59:22,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-07-14 05:59:22,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956061845] [2022-07-14 05:59:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956061845] [2022-07-14 05:59:22,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956061845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:22,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:22,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 05:59:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620988913] [2022-07-14 05:59:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:22,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:59:22,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:59:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 05:59:22,289 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-07-14 05:59:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:22,323 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-07-14 05:59:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 05:59:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2022-07-14 05:59:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:22,324 INFO L225 Difference]: With dead ends: 28 [2022-07-14 05:59:22,324 INFO L226 Difference]: Without dead ends: 28 [2022-07-14 05:59:22,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 05:59:22,325 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:22,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 22 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-14 05:59:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-07-14 05:59:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 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) [2022-07-14 05:59:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-14 05:59:22,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-07-14 05:59:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:22,334 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-14 05:59:22,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-07-14 05:59:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-14 05:59:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 05:59:22,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:22,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 05:59:22,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1139876333, now seen corresponding path program 1 times [2022-07-14 05:59:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013781389] [2022-07-14 05:59:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:22,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013781389] [2022-07-14 05:59:22,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013781389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:22,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:22,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 05:59:22,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302243738] [2022-07-14 05:59:22,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:22,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:59:22,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:22,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:59:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 05:59:22,460 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) 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) [2022-07-14 05:59:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:22,526 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-07-14 05:59:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 05:59:22,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) 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 [2022-07-14 05:59:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:22,528 INFO L225 Difference]: With dead ends: 31 [2022-07-14 05:59:22,528 INFO L226 Difference]: Without dead ends: 31 [2022-07-14 05:59:22,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 05:59:22,531 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:22,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-14 05:59:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-07-14 05:59:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 26 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) [2022-07-14 05:59:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-07-14 05:59:22,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2022-07-14 05:59:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:22,536 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-07-14 05:59:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) 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) [2022-07-14 05:59:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-07-14 05:59:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 05:59:22,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:22,537 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:22,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 05:59:22,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-14 05:59:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:22,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498453680] [2022-07-14 05:59:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498453680] [2022-07-14 05:59:22,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498453680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:22,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430086904] [2022-07-14 05:59:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:22,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:22,609 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) [2022-07-14 05:59:22,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 05:59:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 05:59:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:22,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:22,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430086904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:22,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:22,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-14 05:59:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557750787] [2022-07-14 05:59:22,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:22,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 05:59:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 05:59:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:59:22,921 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2022-07-14 05:59:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:23,067 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-07-14 05:59:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 05:59:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 10 [2022-07-14 05:59:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:23,069 INFO L225 Difference]: With dead ends: 49 [2022-07-14 05:59:23,069 INFO L226 Difference]: Without dead ends: 49 [2022-07-14 05:59:23,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-14 05:59:23,070 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:23,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 66 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-14 05:59:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2022-07-14 05:59:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 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) [2022-07-14 05:59:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-14 05:59:23,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2022-07-14 05:59:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:23,073 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-14 05:59:23,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2022-07-14 05:59:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-14 05:59:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 05:59:23,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:23,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:23,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:23,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1949222959, now seen corresponding path program 1 times [2022-07-14 05:59:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:23,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335191100] [2022-07-14 05:59:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:23,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:23,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335191100] [2022-07-14 05:59:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335191100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:23,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:23,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 05:59:23,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954044473] [2022-07-14 05:59:23,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:23,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 05:59:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 05:59:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 05:59:23,383 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-07-14 05:59:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:23,535 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-07-14 05:59:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:59:23,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 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 [2022-07-14 05:59:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:23,537 INFO L225 Difference]: With dead ends: 36 [2022-07-14 05:59:23,537 INFO L226 Difference]: Without dead ends: 36 [2022-07-14 05:59:23,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-14 05:59:23,539 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:23,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-14 05:59:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2022-07-14 05:59:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 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) [2022-07-14 05:59:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-14 05:59:23,550 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2022-07-14 05:59:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:23,551 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-14 05:59:23,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-07-14 05:59:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-14 05:59:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 05:59:23,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:23,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:23,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 05:59:23,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash -204544928, now seen corresponding path program 1 times [2022-07-14 05:59:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:23,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133439986] [2022-07-14 05:59:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:23,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:23,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133439986] [2022-07-14 05:59:23,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133439986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:23,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:23,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:23,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659562194] [2022-07-14 05:59:23,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:23,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:23,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:23,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:23,607 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:23,620 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-14 05:59:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 05:59:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:23,621 INFO L225 Difference]: With dead ends: 24 [2022-07-14 05:59:23,621 INFO L226 Difference]: Without dead ends: 15 [2022-07-14 05:59:23,622 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 [2022-07-14 05:59:23,622 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:23,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-14 05:59:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-14 05:59:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-14 05:59:23,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-07-14 05:59:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:23,626 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-14 05:59:23,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-14 05:59:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 05:59:23,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:23,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:23,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 05:59:23,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1346179180, now seen corresponding path program 1 times [2022-07-14 05:59:23,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:23,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697223420] [2022-07-14 05:59:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:23,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:23,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:23,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697223420] [2022-07-14 05:59:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697223420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686061887] [2022-07-14 05:59:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:23,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:23,719 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) [2022-07-14 05:59:23,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 05:59:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:23,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 05:59:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:23,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:23,975 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 [2022-07-14 05:59:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:23,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686061887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:23,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:23,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-14 05:59:23,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764728338] [2022-07-14 05:59:23,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:23,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 05:59:23,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 05:59:23,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-14 05:59:23,997 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:24,137 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-07-14 05:59:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:59:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-07-14 05:59:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:24,138 INFO L225 Difference]: With dead ends: 21 [2022-07-14 05:59:24,138 INFO L226 Difference]: Without dead ends: 21 [2022-07-14 05:59:24,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-14 05:59:24,139 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:24,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-14 05:59:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-07-14 05:59:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-14 05:59:24,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-07-14 05:59:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:24,141 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-14 05:59:24,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-14 05:59:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 05:59:24,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:24,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:24,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:24,342 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,SelfDestructingSolverStorable10 [2022-07-14 05:59:24,342 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash -893036467, now seen corresponding path program 2 times [2022-07-14 05:59:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:24,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42539326] [2022-07-14 05:59:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:24,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:24,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42539326] [2022-07-14 05:59:24,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42539326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568673572] [2022-07-14 05:59:24,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:24,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:24,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:24,491 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) [2022-07-14 05:59:24,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 05:59:24,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 05:59:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:24,593 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 [2022-07-14 05:59:24,771 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:24,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 05:59:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:24,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:25,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:25,098 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 [2022-07-14 05:59:25,105 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 26 treesize of output 22 [2022-07-14 05:59:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:25,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568673572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:25,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:25,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-07-14 05:59:25,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052775340] [2022-07-14 05:59:25,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:25,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 05:59:25,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 05:59:25,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-07-14 05:59:25,126 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-07-14 05:59:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:25,368 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-07-14 05:59:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 05:59:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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 16 [2022-07-14 05:59:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:25,369 INFO L225 Difference]: With dead ends: 33 [2022-07-14 05:59:25,369 INFO L226 Difference]: Without dead ends: 27 [2022-07-14 05:59:25,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-07-14 05:59:25,370 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:25,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 49 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-07-14 05:59:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-14 05:59:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-07-14 05:59:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2022-07-14 05:59:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-07-14 05:59:25,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2022-07-14 05:59:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:25,372 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-07-14 05:59:25,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-07-14 05:59:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-07-14 05:59:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 05:59:25,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:25,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:25,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:25,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1388594295, now seen corresponding path program 3 times [2022-07-14 05:59:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:25,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699683595] [2022-07-14 05:59:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:25,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:25,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699683595] [2022-07-14 05:59:25,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699683595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502232222] [2022-07-14 05:59:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:59:25,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:25,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:59:25,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 05:59:25,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 05:59:25,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-14 05:59:25,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:25,904 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 [2022-07-14 05:59:25,989 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 [2022-07-14 05:59:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:25,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:26,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:26,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 05:59:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:26,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502232222] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:26,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:26,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-14 05:59:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863813891] [2022-07-14 05:59:26,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:26,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 05:59:26,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:26,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 05:59:26,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-07-14 05:59:26,158 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:26,416 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-07-14 05:59:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 05:59:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 05:59:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:26,417 INFO L225 Difference]: With dead ends: 38 [2022-07-14 05:59:26,418 INFO L226 Difference]: Without dead ends: 30 [2022-07-14 05:59:26,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-07-14 05:59:26,418 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:26,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 81 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-14 05:59:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-07-14 05:59:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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) [2022-07-14 05:59:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-07-14 05:59:26,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2022-07-14 05:59:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:26,421 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-07-14 05:59:26,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-07-14 05:59:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 05:59:26,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:26,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:26,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:26,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash -954145076, now seen corresponding path program 4 times [2022-07-14 05:59:26,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:26,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543200834] [2022-07-14 05:59:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:26,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543200834] [2022-07-14 05:59:26,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543200834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:26,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434507092] [2022-07-14 05:59:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 05:59:26,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:26,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:26,768 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) [2022-07-14 05:59:26,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 05:59:26,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 05:59:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:26,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 05:59:26,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:26,839 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:26,929 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 [2022-07-14 05:59:27,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:27,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 05:59:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:27,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:27,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:27,359 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 [2022-07-14 05:59:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:27,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434507092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:27,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:27,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-07-14 05:59:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651611659] [2022-07-14 05:59:27,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 05:59:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:27,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 05:59:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-07-14 05:59:27,746 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:28,292 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-07-14 05:59:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 05:59:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-14 05:59:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:28,293 INFO L225 Difference]: With dead ends: 32 [2022-07-14 05:59:28,294 INFO L226 Difference]: Without dead ends: 32 [2022-07-14 05:59:28,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 05:59:28,295 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 83 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 278 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-07-14 05:59:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-14 05:59:28,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-07-14 05:59:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2022-07-14 05:59:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-07-14 05:59:28,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-07-14 05:59:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:28,298 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-07-14 05:59:28,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:28,298 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-07-14 05:59:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 05:59:28,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:28,299 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:28,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-14 05:59:28,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash -344976898, now seen corresponding path program 5 times [2022-07-14 05:59:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134699094] [2022-07-14 05:59:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:28,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134699094] [2022-07-14 05:59:28,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134699094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309152525] [2022-07-14 05:59:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 05:59:28,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:28,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:28,663 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) [2022-07-14 05:59:28,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 05:59:28,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 05:59:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 05:59:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:28,741 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:28,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:29,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309152525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:29,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:29,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-07-14 05:59:29,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144951627] [2022-07-14 05:59:29,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 05:59:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 05:59:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2022-07-14 05:59:29,192 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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) [2022-07-14 05:59:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:29,343 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-07-14 05:59:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 05:59:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-14 05:59:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:29,344 INFO L225 Difference]: With dead ends: 49 [2022-07-14 05:59:29,344 INFO L226 Difference]: Without dead ends: 38 [2022-07-14 05:59:29,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 05:59:29,345 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:29,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 44 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-14 05:59:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-07-14 05:59:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2022-07-14 05:59:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-07-14 05:59:29,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2022-07-14 05:59:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:29,349 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-07-14 05:59:29,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 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) [2022-07-14 05:59:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-07-14 05:59:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 05:59:29,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:29,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:29,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-14 05:59:29,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-14 05:59:29,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1662825919, now seen corresponding path program 6 times [2022-07-14 05:59:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141133292] [2022-07-14 05:59:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:29,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:29,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141133292] [2022-07-14 05:59:29,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141133292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:29,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314464030] [2022-07-14 05:59:29,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 05:59:29,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:29,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:29,740 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) [2022-07-14 05:59:29,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 05:59:29,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 05:59:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-14 05:59:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:29,954 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 [2022-07-14 05:59:30,073 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 [2022-07-14 05:59:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:30,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:30,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:30,148 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 [2022-07-14 05:59:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:30,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314464030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:30,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:30,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-07-14 05:59:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866134347] [2022-07-14 05:59:30,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:30,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 05:59:30,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:30,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 05:59:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-07-14 05:59:30,306 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) [2022-07-14 05:59:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:30,668 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-07-14 05:59:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 05:59:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) Word has length 34 [2022-07-14 05:59:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:30,669 INFO L225 Difference]: With dead ends: 54 [2022-07-14 05:59:30,670 INFO L226 Difference]: Without dead ends: 42 [2022-07-14 05:59:30,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 05:59:30,672 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:30,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 133 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 375 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-07-14 05:59:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-14 05:59:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-07-14 05:59:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-14 05:59:30,675 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-07-14 05:59:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:30,675 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-14 05:59:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) [2022-07-14 05:59:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-14 05:59:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 05:59:30,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:30,676 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:30,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:30,893 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1974118660, now seen corresponding path program 7 times [2022-07-14 05:59:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:30,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712313715] [2022-07-14 05:59:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:31,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:31,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712313715] [2022-07-14 05:59:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712313715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127386587] [2022-07-14 05:59:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 05:59:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:31,063 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) [2022-07-14 05:59:31,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 05:59:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 05:59:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:31,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:31,530 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 [2022-07-14 05:59:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:31,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127386587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:31,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:31,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 30 [2022-07-14 05:59:31,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169919242] [2022-07-14 05:59:31,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:31,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 05:59:31,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 05:59:31,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-07-14 05:59:31,571 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:31,967 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-07-14 05:59:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 05:59:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-14 05:59:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:31,969 INFO L225 Difference]: With dead ends: 42 [2022-07-14 05:59:31,969 INFO L226 Difference]: Without dead ends: 42 [2022-07-14 05:59:31,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 05:59:31,970 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:31,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 102 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-14 05:59:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-14 05:59:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-14 05:59:31,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2022-07-14 05:59:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:31,973 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-14 05:59:31,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-14 05:59:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 05:59:31,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:31,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:31,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:32,179 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,SelfDestructingSolverStorable16 [2022-07-14 05:59:32,180 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1247513155, now seen corresponding path program 8 times [2022-07-14 05:59:32,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607842987] [2022-07-14 05:59:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:32,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:32,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607842987] [2022-07-14 05:59:32,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607842987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842529058] [2022-07-14 05:59:32,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:32,444 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) [2022-07-14 05:59:32,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 05:59:32,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:32,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 05:59:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:32,637 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 [2022-07-14 05:59:33,031 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:33,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 05:59:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:33,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:33,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:33,547 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 [2022-07-14 05:59:33,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 05:59:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:33,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842529058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:33,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:33,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-07-14 05:59:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710474803] [2022-07-14 05:59:33,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:33,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 05:59:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 05:59:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 05:59:33,602 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:34,279 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-07-14 05:59:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 05:59:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-14 05:59:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:34,280 INFO L225 Difference]: With dead ends: 65 [2022-07-14 05:59:34,280 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 05:59:34,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2022-07-14 05:59:34,282 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:34,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 193 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 453 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-07-14 05:59:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 05:59:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-07-14 05:59:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2022-07-14 05:59:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-07-14 05:59:34,284 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2022-07-14 05:59:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:34,284 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-07-14 05:59:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-07-14 05:59:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 05:59:34,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:34,285 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:34,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:34,485 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,SelfDestructingSolverStorable17 [2022-07-14 05:59:34,486 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:34,486 INFO L85 PathProgramCache]: Analyzing trace with hash 285729785, now seen corresponding path program 9 times [2022-07-14 05:59:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:34,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890460518] [2022-07-14 05:59:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:34,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:34,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890460518] [2022-07-14 05:59:34,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890460518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:34,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679625986] [2022-07-14 05:59:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:59:34,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:34,750 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) [2022-07-14 05:59:34,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 05:59:34,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 05:59:34,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:34,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 05:59:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:35,022 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 [2022-07-14 05:59:35,137 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 [2022-07-14 05:59:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:35,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:35,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:35,199 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 [2022-07-14 05:59:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:35,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679625986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:35,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:35,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-07-14 05:59:35,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469543492] [2022-07-14 05:59:35,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:35,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 05:59:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 05:59:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 05:59:35,372 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 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) [2022-07-14 05:59:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:35,942 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-07-14 05:59:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 05:59:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 05:59:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:35,943 INFO L225 Difference]: With dead ends: 70 [2022-07-14 05:59:35,943 INFO L226 Difference]: Without dead ends: 54 [2022-07-14 05:59:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 05:59:35,944 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:35,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 222 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 764 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-07-14 05:59:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-14 05:59:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-14 05:59:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 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) [2022-07-14 05:59:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-07-14 05:59:35,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-07-14 05:59:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:35,950 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-07-14 05:59:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 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) [2022-07-14 05:59:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-07-14 05:59:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 05:59:35,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:35,951 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:35,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:36,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:36,163 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1048562116, now seen corresponding path program 10 times [2022-07-14 05:59:36,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:36,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946251630] [2022-07-14 05:59:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:36,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:36,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:36,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946251630] [2022-07-14 05:59:36,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946251630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:36,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672113624] [2022-07-14 05:59:36,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 05:59:36,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:36,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:36,424 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) [2022-07-14 05:59:36,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 05:59:36,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 05:59:36,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:36,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 05:59:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:36,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:36,796 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 [2022-07-14 05:59:37,097 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:37,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 05:59:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:37,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:37,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:37,647 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 [2022-07-14 05:59:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:38,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672113624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:38,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:38,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 55 [2022-07-14 05:59:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020222598] [2022-07-14 05:59:38,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:38,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-14 05:59:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-14 05:59:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2747, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 05:59:38,564 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 56 states, 55 states have (on average 2.618181818181818) internal successors, (144), 56 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:39,489 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-07-14 05:59:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 05:59:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.618181818181818) internal successors, (144), 56 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have 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 [2022-07-14 05:59:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:39,490 INFO L225 Difference]: With dead ends: 56 [2022-07-14 05:59:39,490 INFO L226 Difference]: Without dead ends: 56 [2022-07-14 05:59:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=855, Invalid=4257, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 05:59:39,492 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:39,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 230 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 884 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2022-07-14 05:59:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-14 05:59:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-07-14 05:59:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2022-07-14 05:59:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-07-14 05:59:39,495 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-07-14 05:59:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:39,495 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-07-14 05:59:39,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.618181818181818) internal successors, (144), 56 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:39,496 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-07-14 05:59:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 05:59:39,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:39,501 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:39,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-14 05:59:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:39,707 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -38131346, now seen corresponding path program 11 times [2022-07-14 05:59:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267514159] [2022-07-14 05:59:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267514159] [2022-07-14 05:59:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267514159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979442826] [2022-07-14 05:59:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 05:59:39,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:39,933 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) [2022-07-14 05:59:39,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 05:59:40,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 05:59:40,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 05:59:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:40,026 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 81 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:40,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 81 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:40,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979442826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:40,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:40,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2022-07-14 05:59:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285909783] [2022-07-14 05:59:40,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 05:59:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 05:59:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 05:59:40,964 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:41,276 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-07-14 05:59:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 05:59:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-14 05:59:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:41,277 INFO L225 Difference]: With dead ends: 81 [2022-07-14 05:59:41,277 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 05:59:41,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 05:59:41,279 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:41,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 71 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 05:59:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-07-14 05:59:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-07-14 05:59:41,281 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-07-14 05:59:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:41,281 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-07-14 05:59:41,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-07-14 05:59:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 05:59:41,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:41,282 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:41,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:41,482 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,SelfDestructingSolverStorable20 [2022-07-14 05:59:41,483 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1873381553, now seen corresponding path program 12 times [2022-07-14 05:59:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:41,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079267857] [2022-07-14 05:59:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:41,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079267857] [2022-07-14 05:59:41,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079267857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455649049] [2022-07-14 05:59:41,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 05:59:41,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:41,892 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) [2022-07-14 05:59:41,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 05:59:42,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-14 05:59:42,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 05:59:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:42,280 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 [2022-07-14 05:59:42,412 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 [2022-07-14 05:59:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:42,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:42,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:42,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 05:59:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:42,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455649049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:42,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:42,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-14 05:59:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471746667] [2022-07-14 05:59:42,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:42,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 05:59:42,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 05:59:42,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 05:59:42,734 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:43,709 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2022-07-14 05:59:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 05:59:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-14 05:59:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:43,710 INFO L225 Difference]: With dead ends: 86 [2022-07-14 05:59:43,710 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 05:59:43,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 05:59:43,711 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:43,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 320 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 05:59:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 05:59:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-07-14 05:59:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 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) [2022-07-14 05:59:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-07-14 05:59:43,714 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-07-14 05:59:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:43,715 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-07-14 05:59:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-07-14 05:59:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 05:59:43,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:43,716 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:43,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-14 05:59:43,927 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,SelfDestructingSolverStorable21 [2022-07-14 05:59:43,928 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1870557580, now seen corresponding path program 13 times [2022-07-14 05:59:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601738013] [2022-07-14 05:59:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601738013] [2022-07-14 05:59:44,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601738013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725438074] [2022-07-14 05:59:44,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 05:59:44,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:44,263 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) [2022-07-14 05:59:44,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 05:59:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 05:59:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:44,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:44,904 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 [2022-07-14 05:59:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:44,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725438074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:44,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:44,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2022-07-14 05:59:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544768376] [2022-07-14 05:59:44,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 05:59:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 05:59:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 05:59:44,968 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 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) [2022-07-14 05:59:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:45,552 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-07-14 05:59:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 05:59:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 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 62 [2022-07-14 05:59:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:45,553 INFO L225 Difference]: With dead ends: 66 [2022-07-14 05:59:45,554 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 05:59:45,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=660, Invalid=2880, Unknown=0, NotChecked=0, Total=3540 [2022-07-14 05:59:45,555 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 154 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:45,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 222 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 05:59:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 05:59:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-07-14 05:59:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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) [2022-07-14 05:59:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-07-14 05:59:45,558 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-07-14 05:59:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:45,558 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-07-14 05:59:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 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) [2022-07-14 05:59:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-07-14 05:59:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 05:59:45,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:45,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:45,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-14 05:59:45,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:45,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1985462061, now seen corresponding path program 14 times [2022-07-14 05:59:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:45,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487916297] [2022-07-14 05:59:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:46,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:46,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487916297] [2022-07-14 05:59:46,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487916297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:46,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266807267] [2022-07-14 05:59:46,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:46,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:46,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:46,167 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) [2022-07-14 05:59:46,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 05:59:46,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-14 05:59:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:46,471 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 [2022-07-14 05:59:47,146 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:47,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 05:59:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:47,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:48,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:48,064 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 [2022-07-14 05:59:48,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 05:59:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:48,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266807267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:48,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:48,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 64 [2022-07-14 05:59:48,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212828072] [2022-07-14 05:59:48,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:48,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-14 05:59:48,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-14 05:59:48,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3727, Unknown=0, NotChecked=0, Total=4032 [2022-07-14 05:59:48,144 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 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) [2022-07-14 05:59:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:49,194 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-07-14 05:59:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-14 05:59:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 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 64 [2022-07-14 05:59:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:49,194 INFO L225 Difference]: With dead ends: 97 [2022-07-14 05:59:49,195 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 05:59:49,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=522, Invalid=5958, Unknown=0, NotChecked=0, Total=6480 [2022-07-14 05:59:49,197 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:49,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 406 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 977 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-07-14 05:59:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 05:59:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-07-14 05:59:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 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) [2022-07-14 05:59:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-07-14 05:59:49,199 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 64 [2022-07-14 05:59:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:49,199 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-07-14 05:59:49,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.3125) internal successors, (148), 64 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) [2022-07-14 05:59:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-07-14 05:59:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-14 05:59:49,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:49,201 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:49,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:49,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:49,403 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1317550185, now seen corresponding path program 15 times [2022-07-14 05:59:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:49,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844419590] [2022-07-14 05:59:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:49,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844419590] [2022-07-14 05:59:49,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844419590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66012368] [2022-07-14 05:59:49,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:59:49,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:49,841 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) [2022-07-14 05:59:49,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 05:59:49,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-14 05:59:49,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-14 05:59:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:50,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 05:59:50,439 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 [2022-07-14 05:59:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:50,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:50,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:50,522 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 26 treesize of output 22 [2022-07-14 05:59:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:50,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66012368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:50,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:50,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-14 05:59:50,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503222252] [2022-07-14 05:59:50,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:50,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 05:59:50,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 05:59:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 05:59:50,721 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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) [2022-07-14 05:59:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:51,877 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-07-14 05:59:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 05:59:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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 70 [2022-07-14 05:59:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:51,878 INFO L225 Difference]: With dead ends: 102 [2022-07-14 05:59:51,878 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 05:59:51,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=329, Invalid=4641, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 05:59:51,879 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:51,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 447 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1717 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-07-14 05:59:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 05:59:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-07-14 05:59:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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) [2022-07-14 05:59:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-07-14 05:59:51,881 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2022-07-14 05:59:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:51,882 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-07-14 05:59:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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) [2022-07-14 05:59:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-07-14 05:59:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 05:59:51,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:51,883 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:51,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:52,091 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,SelfDestructingSolverStorable24 [2022-07-14 05:59:52,092 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash 676245932, now seen corresponding path program 16 times [2022-07-14 05:59:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:52,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782008021] [2022-07-14 05:59:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:52,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:52,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:52,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782008021] [2022-07-14 05:59:52,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782008021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:52,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924953244] [2022-07-14 05:59:52,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 05:59:52,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:52,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:52,521 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) [2022-07-14 05:59:52,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 05:59:52,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 05:59:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:52,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-14 05:59:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:52,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:52,821 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 [2022-07-14 05:59:53,301 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:53,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 05:59:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 200 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:53,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:54,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 05:59:54,101 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 [2022-07-14 05:59:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 231 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:55,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924953244] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:55,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:55,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 70 [2022-07-14 05:59:55,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195452410] [2022-07-14 05:59:55,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:55,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-14 05:59:55,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-14 05:59:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4416, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 05:59:55,539 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 71 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 71 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:56,854 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-14 05:59:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 05:59:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 71 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-14 05:59:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:56,855 INFO L225 Difference]: With dead ends: 80 [2022-07-14 05:59:56,855 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 05:59:56,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1305, Invalid=6705, Unknown=0, NotChecked=0, Total=8010 [2022-07-14 05:59:56,857 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 198 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:56,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 313 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1401 Invalid, 0 Unknown, 46 Unchecked, 0.6s Time] [2022-07-14 05:59:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 05:59:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-07-14 05:59:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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) [2022-07-14 05:59:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-07-14 05:59:56,859 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-07-14 05:59:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:56,860 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-07-14 05:59:56,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 71 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-07-14 05:59:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-14 05:59:56,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:56,861 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:56,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:57,075 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,SelfDestructingSolverStorable25 [2022-07-14 05:59:57,075 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 05:59:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 419261662, now seen corresponding path program 17 times [2022-07-14 05:59:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036872282] [2022-07-14 05:59:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:57,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 146 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036872282] [2022-07-14 05:59:57,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036872282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159036648] [2022-07-14 05:59:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 05:59:57,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:57,450 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) [2022-07-14 05:59:57,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 05:59:57,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-14 05:59:57,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:57,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 05:59:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:57,596 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:59:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:58,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:59,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159036648] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:59,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:59,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2022-07-14 05:59:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530026853] [2022-07-14 05:59:59,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:59,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-14 05:59:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-14 05:59:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 05:59:59,082 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:59,887 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2022-07-14 05:59:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 05:59:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-14 05:59:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:59,888 INFO L225 Difference]: With dead ends: 113 [2022-07-14 05:59:59,888 INFO L226 Difference]: Without dead ends: 86 [2022-07-14 05:59:59,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1615, Invalid=6941, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 05:59:59,889 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:59,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 62 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-14 05:59:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-07-14 05:59:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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) [2022-07-14 05:59:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-07-14 05:59:59,892 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2022-07-14 05:59:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:59,892 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-07-14 05:59:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-07-14 05:59:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-14 05:59:59,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:59,893 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:59,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:00:00,099 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,SelfDestructingSolverStorable26 [2022-07-14 06:00:00,099 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-14 06:00:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash -215747807, now seen corresponding path program 18 times [2022-07-14 06:00:00,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873534787] [2022-07-14 06:00:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:00,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:00:00,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:00,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873534787] [2022-07-14 06:00:00,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873534787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:00,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015720702] [2022-07-14 06:00:00,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:00:00,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:00,611 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) [2022-07-14 06:00:00,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:00:00,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-14 06:00:00,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:00:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:00,810 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:00:00,943 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 [2022-07-14 06:00:01,255 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:01,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:00:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-14 06:00:01,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:01,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-14 06:00:01,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-14 06:00:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-14 06:00:01,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015720702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:01,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:01,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 6, 6] total 42 [2022-07-14 06:00:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219262942] [2022-07-14 06:00:01,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:01,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:00:01,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:00:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1633, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:00:01,898 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 42 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:03,662 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2022-07-14 06:00:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-14 06:00:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 42 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-14 06:00:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:03,663 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:00:03,663 INFO L226 Difference]: Without dead ends: 0 [2022-07-14 06:00:03,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=420, Invalid=7062, Unknown=0, NotChecked=0, Total=7482 [2022-07-14 06:00:03,664 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:03,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 508 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1248 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-07-14 06:00:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-14 06:00:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-14 06:00:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-14 06:00:03,665 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2022-07-14 06:00:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:03,665 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 06:00:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 42 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-14 06:00:03,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-14 06:00:03,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2022-07-14 06:00:03,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-07-14 06:00:03,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-07-14 06:00:03,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-07-14 06:00:03,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-07-14 06:00:03,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2022-07-14 06:00:03,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-07-14 06:00:03,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:00:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:03,881 INFO L356 BasicCegarLoop]: Path program histogram: [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:03,883 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 06:00:03,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 06:00:03 BoogieIcfgContainer [2022-07-14 06:00:03,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 06:00:03,885 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 06:00:03,885 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 06:00:03,887 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 06:00:03,887 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:59:21" (3/4) ... [2022-07-14 06:00:03,889 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-14 06:00:03,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-07-14 06:00:03,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-14 06:00:03,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-14 06:00:03,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-14 06:00:03,920 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 06:00:03,920 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 06:00:03,921 INFO L158 Benchmark]: Toolchain (without parser) took 43371.27ms. Allocated memory was 83.9MB in the beginning and 121.6MB in the end (delta: 37.7MB). Free memory was 51.9MB in the beginning and 74.5MB in the end (delta: -22.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2022-07-14 06:00:03,921 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 83.9MB. Free memory was 39.2MB in the beginning and 39.2MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:00:03,921 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.41ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 51.7MB in the beginning and 70.4MB in the end (delta: -18.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:00:03,921 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.64ms. Allocated memory is still 100.7MB. Free memory was 70.4MB in the beginning and 68.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:00:03,922 INFO L158 Benchmark]: Boogie Preprocessor took 37.24ms. Allocated memory is still 100.7MB. Free memory was 68.3MB in the beginning and 67.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:00:03,922 INFO L158 Benchmark]: RCFGBuilder took 345.56ms. Allocated memory is still 100.7MB. Free memory was 67.2MB in the beginning and 56.2MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-14 06:00:03,922 INFO L158 Benchmark]: TraceAbstraction took 42500.81ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 76.5MB in the end (delta: -20.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:00:03,922 INFO L158 Benchmark]: Witness Printer took 35.25ms. Allocated memory is still 121.6MB. Free memory was 76.5MB in the beginning and 74.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:00:03,923 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 83.9MB. Free memory was 39.2MB in the beginning and 39.2MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 395.41ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 51.7MB in the beginning and 70.4MB in the end (delta: -18.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.64ms. Allocated memory is still 100.7MB. Free memory was 70.4MB in the beginning and 68.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.24ms. Allocated memory is still 100.7MB. Free memory was 68.3MB in the beginning and 67.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 345.56ms. Allocated memory is still 100.7MB. Free memory was 67.2MB in the beginning and 56.2MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 42500.81ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 55.7MB in the beginning and 76.5MB in the end (delta: -20.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Witness Printer took 35.25ms. Allocated memory is still 121.6MB. Free memory was 76.5MB in the beginning and 74.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 42.5s, OverallIterations: 28, TraceHistogramMax: 13, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 13.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1589 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1589 mSDsluCounter, 3874 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 643 IncrementalHoareTripleChecker+Unchecked, 3557 mSDsCounter, 729 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12195 IncrementalHoareTripleChecker+Invalid, 13567 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 729 mSolverCounterUnsat, 317 mSDtfsCounter, 12195 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2412 GetRequests, 1335 SyntacticMatches, 40 SemanticMatches, 1037 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 10961 ImplicationChecksByTransitivity, 21.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=27, InterpolantAutomatonStates: 495, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 114 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 22.8s InterpolantComputationTime, 1808 NumberOfCodeBlocks, 1784 NumberOfCodeBlocksAsserted, 125 NumberOfCheckSat, 2610 ConstructedInterpolants, 109 QuantifiedInterpolants, 28227 SizeOfPredicates, 241 NumberOfNonLiveVariables, 3946 ConjunctsInSsa, 972 ConjunctsInUnsatCore, 66 InterpolantComputations, 9 PerfectInterpolantSequences, 3273/8747 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-14 06:00:03,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE