./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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-examples/standard_strcpy_ground-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 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:05:29,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:05:29,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:05:29,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:05:29,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:05:29,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:05:29,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:05:29,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:05:29,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:05:29,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:05:29,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:05:29,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:05:29,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:05:29,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:05:29,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:05:29,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:05:29,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:05:29,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:05:29,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:05:29,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:05:29,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:05:29,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:05:29,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:05:29,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:05:29,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:05:29,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:05:29,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:05:29,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:05:29,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:05:29,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:05:29,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:05:29,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:05:29,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:05:29,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:05:29,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:05:29,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:05:29,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:05:29,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:05:29,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:05:29,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:05:29,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:05:29,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:05:29,705 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:05:29,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:05:29,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:05:29,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:05:29,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:05:29,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:05:29,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:05:29,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:05:29,708 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:05:29,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:05:29,709 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:05:29,709 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:05:29,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:05:29,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:05:29,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:05:29,710 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:05:29,710 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:05:29,710 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:05:29,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:05:29,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:05:29,711 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:05:29,711 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:05:29,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:05:29,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:05:29,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:05:29,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:05:29,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:05:29,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:05:29,713 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2023-02-16 03:05:29,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:05:29,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:05:29,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:05:29,956 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:05:29,956 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:05:29,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2023-02-16 03:05:31,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:05:31,219 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:05:31,219 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2023-02-16 03:05:31,224 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0df1313ab/384c682495b644dcbd48ed76a8fb5170/FLAG141c77be2 [2023-02-16 03:05:31,239 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0df1313ab/384c682495b644dcbd48ed76a8fb5170 [2023-02-16 03:05:31,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:05:31,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:05:31,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:05:31,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:05:31,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:05:31,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319651be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31, skipping insertion in model container [2023-02-16 03:05:31,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:05:31,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:05:31,363 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2023-02-16 03:05:31,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:05:31,394 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:05:31,407 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2023-02-16 03:05:31,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:05:31,424 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:05:31,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31 WrapperNode [2023-02-16 03:05:31,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:05:31,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:05:31,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:05:31,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:05:31,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,466 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-02-16 03:05:31,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:05:31,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:05:31,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:05:31,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:05:31,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:05:31,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:05:31,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:05:31,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:05:31,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (1/1) ... [2023-02-16 03:05:31,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:05:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:31,520 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) [2023-02-16 03:05:31,524 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 [2023-02-16 03:05:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:05:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:05:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:05:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:05:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:05:31,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:05:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:05:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:05:31,625 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:05:31,629 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:05:31,886 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:05:31,891 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:05:31,891 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 03:05:31,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:05:31 BoogieIcfgContainer [2023-02-16 03:05:31,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:05:31,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:05:31,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:05:31,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:05:31,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:05:31" (1/3) ... [2023-02-16 03:05:31,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55abc57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:05:31, skipping insertion in model container [2023-02-16 03:05:31,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:31" (2/3) ... [2023-02-16 03:05:31,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55abc57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:05:31, skipping insertion in model container [2023-02-16 03:05:31,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:05:31" (3/3) ... [2023-02-16 03:05:31,915 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2023-02-16 03:05:31,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:05:31,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-02-16 03:05:31,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:05:31,995 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7efd6be6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:05:31,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-02-16 03:05:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 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) [2023-02-16 03:05:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:05:32,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:32,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:05:32,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:32,014 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-02-16 03:05:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:32,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972054086] [2023-02-16 03:05:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972054086] [2023-02-16 03:05:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972054086] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:32,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:32,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:32,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130776224] [2023-02-16 03:05:32,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:32,348 INFO L87 Difference]: Start difference. First operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:32,394 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-02-16 03:05:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-16 03:05:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:32,403 INFO L225 Difference]: With dead ends: 35 [2023-02-16 03:05:32,405 INFO L226 Difference]: Without dead ends: 33 [2023-02-16 03:05:32,407 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 [2023-02-16 03:05:32,414 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:32,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-16 03:05:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-16 03:05:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-16 03:05:32,445 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 4 [2023-02-16 03:05:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:32,445 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-16 03:05:32,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-16 03:05:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-16 03:05:32,446 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:32,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-16 03:05:32,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:05:32,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-02-16 03:05:32,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256265069] [2023-02-16 03:05:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:32,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:32,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256265069] [2023-02-16 03:05:32,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256265069] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:32,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:32,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917926809] [2023-02-16 03:05:32,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:32,589 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:32,624 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-16 03:05:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-16 03:05:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:32,625 INFO L225 Difference]: With dead ends: 37 [2023-02-16 03:05:32,625 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 03:05:32,626 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 [2023-02-16 03:05:32,627 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:32,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 03:05:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-16 03:05:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.48) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-02-16 03:05:32,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 4 [2023-02-16 03:05:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:32,632 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-02-16 03:05:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-02-16 03:05:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:05:32,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:32,633 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:32,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:05:32,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-02-16 03:05:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228637780] [2023-02-16 03:05:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:32,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228637780] [2023-02-16 03:05:32,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228637780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:32,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039226546] [2023-02-16 03:05:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:32,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:32,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:32,814 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) [2023-02-16 03:05:32,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:05:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-16 03:05:32,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:05:32,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:05:32,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:05:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:32,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:33,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039226546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:33,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:33,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-02-16 03:05:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196883804] [2023-02-16 03:05:33,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:33,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:05:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:33,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:05:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:05:33,102 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:33,222 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-02-16 03:05:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:05:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 03:05:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:33,230 INFO L225 Difference]: With dead ends: 48 [2023-02-16 03:05:33,230 INFO L226 Difference]: Without dead ends: 48 [2023-02-16 03:05:33,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:05:33,235 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:33,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 49 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-16 03:05:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-02-16 03:05:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-02-16 03:05:33,246 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2023-02-16 03:05:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:33,247 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-02-16 03:05:33,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-02-16 03:05:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:05:33,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:33,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 03:05:33,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 03:05:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:33,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2023-02-16 03:05:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:33,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101687132] [2023-02-16 03:05:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:33,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101687132] [2023-02-16 03:05:33,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101687132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254001066] [2023-02-16 03:05:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:33,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:33,607 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) [2023-02-16 03:05:33,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:05:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 03:05:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:33,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:33,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254001066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:33,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:33,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-02-16 03:05:33,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812861867] [2023-02-16 03:05:33,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:33,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:05:33,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:33,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:05:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:05:33,742 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:33,993 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2023-02-16 03:05:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:05:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 03:05:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:33,998 INFO L225 Difference]: With dead ends: 197 [2023-02-16 03:05:33,999 INFO L226 Difference]: Without dead ends: 197 [2023-02-16 03:05:33,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:05:34,002 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 367 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:34,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 125 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:05:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-16 03:05:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 54. [2023-02-16 03:05:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-02-16 03:05:34,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 13 [2023-02-16 03:05:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:34,020 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-02-16 03:05:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-02-16 03:05:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 03:05:34,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:34,022 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-02-16 03:05:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:34,226 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,SelfDestructingSolverStorable3 [2023-02-16 03:05:34,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-02-16 03:05:34,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222757841] [2023-02-16 03:05:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222757841] [2023-02-16 03:05:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222757841] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:34,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799445962] [2023-02-16 03:05:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:34,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:34,477 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) [2023-02-16 03:05:34,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:05:34,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:05:34,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 03:05:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:05:34,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:05:34,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:05:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:34,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:34,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799445962] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:34,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:34,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-16 03:05:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067527394] [2023-02-16 03:05:34,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:34,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:05:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:05:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:34,908 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,199 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2023-02-16 03:05:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:05:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 03:05:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,200 INFO L225 Difference]: With dead ends: 75 [2023-02-16 03:05:35,200 INFO L226 Difference]: Without dead ends: 75 [2023-02-16 03:05:35,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:05:35,201 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:35,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:05:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-16 03:05:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2023-02-16 03:05:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 70 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) [2023-02-16 03:05:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-02-16 03:05:35,205 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 20 [2023-02-16 03:05:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,205 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-02-16 03:05:35,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-02-16 03:05:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 03:05:35,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,207 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:35,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:35,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:35,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2023-02-16 03:05:35,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356696459] [2023-02-16 03:05:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:05:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356696459] [2023-02-16 03:05:35,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356696459] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:35,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:35,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:35,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227987303] [2023-02-16 03:05:35,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:35,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:35,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:35,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:35,473 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-02-16 03:05:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,485 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2023-02-16 03:05:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 32 [2023-02-16 03:05:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,486 INFO L225 Difference]: With dead ends: 69 [2023-02-16 03:05:35,487 INFO L226 Difference]: Without dead ends: 69 [2023-02-16 03:05:35,487 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 [2023-02-16 03:05:35,488 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 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 [2023-02-16 03:05:35,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-16 03:05:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-16 03:05:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-02-16 03:05:35,503 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 32 [2023-02-16 03:05:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,504 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-02-16 03:05:35,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-02-16 03:05:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-02-16 03:05:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 03:05:35,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,506 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:05:35,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2023-02-16 03:05:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:35,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130970162] [2023-02-16 03:05:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:05:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130970162] [2023-02-16 03:05:35,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130970162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:35,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:35,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:05:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351849867] [2023-02-16 03:05:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:35,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:35,597 INFO L87 Difference]: Start difference. First operand 69 states and 75 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) [2023-02-16 03:05:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,631 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-02-16 03:05:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:35,632 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 32 [2023-02-16 03:05:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,635 INFO L225 Difference]: With dead ends: 86 [2023-02-16 03:05:35,635 INFO L226 Difference]: Without dead ends: 86 [2023-02-16 03:05:35,635 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 [2023-02-16 03:05:35,636 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:35,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 26 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-16 03:05:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2023-02-16 03:05:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2023-02-16 03:05:35,645 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 32 [2023-02-16 03:05:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,645 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2023-02-16 03:05:35,645 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) [2023-02-16 03:05:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2023-02-16 03:05:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 03:05:35,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,646 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:05:35,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 154582664, now seen corresponding path program 1 times [2023-02-16 03:05:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:35,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763379557] [2023-02-16 03:05:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:05:35,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763379557] [2023-02-16 03:05:35,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763379557] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:35,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:35,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:05:35,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71481075] [2023-02-16 03:05:35,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:35,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:35,698 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:35,729 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2023-02-16 03:05:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-16 03:05:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:35,730 INFO L225 Difference]: With dead ends: 78 [2023-02-16 03:05:35,731 INFO L226 Difference]: Without dead ends: 78 [2023-02-16 03:05:35,731 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 [2023-02-16 03:05:35,731 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:35,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-16 03:05:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2023-02-16 03:05:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 67 states have (on average 1.208955223880597) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2023-02-16 03:05:35,734 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 33 [2023-02-16 03:05:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:35,735 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2023-02-16 03:05:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2023-02-16 03:05:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:05:35,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:35,736 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:35,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 03:05:35,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2023-02-16 03:05:35,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:35,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718674118] [2023-02-16 03:05:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:35,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:35,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718674118] [2023-02-16 03:05:35,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718674118] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:35,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111904070] [2023-02-16 03:05:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:35,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:35,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:35,825 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) [2023-02-16 03:05:35,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:05:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:35,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:05:35,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:36,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111904070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:36,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:36,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-16 03:05:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220388412] [2023-02-16 03:05:36,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:36,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:05:36,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:36,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:05:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:36,078 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2023-02-16 03:05:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:36,279 INFO L93 Difference]: Finished difference Result 382 states and 397 transitions. [2023-02-16 03:05:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:05:36,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 [2023-02-16 03:05:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:36,282 INFO L225 Difference]: With dead ends: 382 [2023-02-16 03:05:36,282 INFO L226 Difference]: Without dead ends: 382 [2023-02-16 03:05:36,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:36,284 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 663 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:36,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 246 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:05:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-02-16 03:05:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 89. [2023-02-16 03:05:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-02-16 03:05:36,291 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 34 [2023-02-16 03:05:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:36,291 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-02-16 03:05:36,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2023-02-16 03:05:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-02-16 03:05:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:05:36,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:36,297 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2023-02-16 03:05:36,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:36,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:36,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2023-02-16 03:05:36,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:36,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896170235] [2023-02-16 03:05:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:36,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:36,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896170235] [2023-02-16 03:05:36,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896170235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:36,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258486312] [2023-02-16 03:05:36,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:05:36,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:36,928 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) [2023-02-16 03:05:36,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:05:36,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:05:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:05:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:05:37,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:05:37,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:05:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-16 03:05:37,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:05:37,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258486312] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:37,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:05:37,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2023-02-16 03:05:37,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647146125] [2023-02-16 03:05:37,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:37,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:05:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:05:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:37,207 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:37,254 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2023-02-16 03:05:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:05:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-16 03:05:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:37,255 INFO L225 Difference]: With dead ends: 90 [2023-02-16 03:05:37,255 INFO L226 Difference]: Without dead ends: 90 [2023-02-16 03:05:37,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:37,256 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:37,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-16 03:05:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2023-02-16 03:05:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2023-02-16 03:05:37,258 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 44 [2023-02-16 03:05:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:37,258 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2023-02-16 03:05:37,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2023-02-16 03:05:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 03:05:37,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:37,259 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:37,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:37,460 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,SelfDestructingSolverStorable9 [2023-02-16 03:05:37,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:37,461 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2023-02-16 03:05:37,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:37,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972210534] [2023-02-16 03:05:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972210534] [2023-02-16 03:05:37,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972210534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480257728] [2023-02-16 03:05:37,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:37,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:37,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:37,751 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) [2023-02-16 03:05:37,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:05:37,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:05:37,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:05:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:37,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:38,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480257728] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:38,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:38,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-16 03:05:38,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912568414] [2023-02-16 03:05:38,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:38,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:05:38,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:05:38,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:05:38,287 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:38,782 INFO L93 Difference]: Finished difference Result 794 states and 825 transitions. [2023-02-16 03:05:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 03:05:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-02-16 03:05:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:38,786 INFO L225 Difference]: With dead ends: 794 [2023-02-16 03:05:38,786 INFO L226 Difference]: Without dead ends: 794 [2023-02-16 03:05:38,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:05:38,787 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1784 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:38,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 521 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:05:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-02-16 03:05:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 152. [2023-02-16 03:05:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 151 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2023-02-16 03:05:38,792 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 66 [2023-02-16 03:05:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:38,793 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2023-02-16 03:05:38,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2023-02-16 03:05:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-16 03:05:38,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:38,796 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:38,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:39,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:39,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2023-02-16 03:05:39,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:39,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804166106] [2023-02-16 03:05:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:39,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 03:05:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804166106] [2023-02-16 03:05:39,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804166106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331276618] [2023-02-16 03:05:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:05:39,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:39,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:39,897 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) [2023-02-16 03:05:39,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:05:39,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:05:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:05:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-16 03:05:40,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:40,395 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2023-02-16 03:05:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-16 03:05:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331276618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:40,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:40,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2023-02-16 03:05:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074824382] [2023-02-16 03:05:40,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-16 03:05:40,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-16 03:05:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:05:40,571 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:42,613 INFO L93 Difference]: Finished difference Result 821 states and 857 transitions. [2023-02-16 03:05:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-16 03:05:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-02-16 03:05:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:42,616 INFO L225 Difference]: With dead ends: 821 [2023-02-16 03:05:42,616 INFO L226 Difference]: Without dead ends: 821 [2023-02-16 03:05:42,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2023-02-16 03:05:42,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5965 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5965 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:42,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5965 Valid, 396 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:05:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-02-16 03:05:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 313. [2023-02-16 03:05:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.231270358306189) internal successors, (378), 312 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 378 transitions. [2023-02-16 03:05:42,627 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 378 transitions. Word has length 130 [2023-02-16 03:05:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:42,627 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 378 transitions. [2023-02-16 03:05:42,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 378 transitions. [2023-02-16 03:05:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-16 03:05:42,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:42,628 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:42,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:42,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:42,833 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1547574073, now seen corresponding path program 1 times [2023-02-16 03:05:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394099194] [2023-02-16 03:05:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394099194] [2023-02-16 03:05:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394099194] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646208924] [2023-02-16 03:05:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:43,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:43,698 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) [2023-02-16 03:05:43,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:05:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:05:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:43,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:45,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646208924] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:45,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:45,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2023-02-16 03:05:45,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488535471] [2023-02-16 03:05:45,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:45,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-16 03:05:45,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-16 03:05:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:05:45,258 INFO L87 Difference]: Start difference. First operand 313 states and 378 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:46,963 INFO L93 Difference]: Finished difference Result 1646 states and 1711 transitions. [2023-02-16 03:05:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-16 03:05:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2023-02-16 03:05:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:46,968 INFO L225 Difference]: With dead ends: 1646 [2023-02-16 03:05:46,969 INFO L226 Difference]: Without dead ends: 1646 [2023-02-16 03:05:46,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:05:46,975 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4239 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:46,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4239 Valid, 1050 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:05:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2023-02-16 03:05:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 445. [2023-02-16 03:05:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 439 states have (on average 1.1617312072892938) internal successors, (510), 444 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 510 transitions. [2023-02-16 03:05:46,985 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 510 transitions. Word has length 134 [2023-02-16 03:05:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:46,985 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 510 transitions. [2023-02-16 03:05:46,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 510 transitions. [2023-02-16 03:05:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-16 03:05:46,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:46,987 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:46,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:47,193 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,SelfDestructingSolverStorable12 [2023-02-16 03:05:47,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash 964792156, now seen corresponding path program 2 times [2023-02-16 03:05:47,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:47,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927823647] [2023-02-16 03:05:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927823647] [2023-02-16 03:05:50,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927823647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:50,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524544776] [2023-02-16 03:05:50,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:50,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:50,221 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) [2023-02-16 03:05:50,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:05:50,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:05:50,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:05:50,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:51,778 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_832 Int) (|v_ULTIMATE.start_main_~#src~0#1.base_24| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_18| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_24| 1))) (and (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_24|)) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#dst~0#1.base_18| v_ArrVal_832) |v_ULTIMATE.start_main_~#src~0#1.base_24| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_18| 0)) (= 0 (select .cse0 |v_ULTIMATE.start_main_~#dst~0#1.base_18|))))) is different from true [2023-02-16 03:05:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-02-16 03:05:51,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:05:51,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524544776] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:51,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:05:51,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2023-02-16 03:05:51,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041848725] [2023-02-16 03:05:51,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:51,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:51,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-16 03:05:51,794 INFO L87 Difference]: Start difference. First operand 445 states and 510 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:51,811 INFO L93 Difference]: Finished difference Result 444 states and 509 transitions. [2023-02-16 03:05:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2023-02-16 03:05:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:51,813 INFO L225 Difference]: With dead ends: 444 [2023-02-16 03:05:51,813 INFO L226 Difference]: Without dead ends: 440 [2023-02-16 03:05:51,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2023-02-16 03:05:51,814 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:51,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2023-02-16 03:05:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-02-16 03:05:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2023-02-16 03:05:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1586206896551725) internal successors, (504), 439 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 504 transitions. [2023-02-16 03:05:51,821 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 504 transitions. Word has length 266 [2023-02-16 03:05:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:51,821 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 504 transitions. [2023-02-16 03:05:51,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 504 transitions. [2023-02-16 03:05:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-02-16 03:05:51,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:51,824 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:51,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:52,030 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,SelfDestructingSolverStorable13 [2023-02-16 03:05:52,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:05:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2023-02-16 03:05:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:52,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782940467] [2023-02-16 03:05:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:05:55,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:55,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782940467] [2023-02-16 03:05:55,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782940467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:55,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411272126] [2023-02-16 03:05:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:55,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:55,031 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) [2023-02-16 03:05:55,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:05:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:55,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-16 03:05:55,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:05:55,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:05:59,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411272126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:59,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:59,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-16 03:05:59,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036091943] [2023-02-16 03:05:59,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:59,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-16 03:05:59,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-16 03:05:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 03:05:59,895 INFO L87 Difference]: Start difference. First operand 440 states and 504 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:13,696 INFO L93 Difference]: Finished difference Result 2967 states and 3098 transitions. [2023-02-16 03:06:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-02-16 03:06:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2023-02-16 03:06:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:13,705 INFO L225 Difference]: With dead ends: 2967 [2023-02-16 03:06:13,705 INFO L226 Difference]: Without dead ends: 2967 [2023-02-16 03:06:13,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 03:06:13,709 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9218 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9218 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:13,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9218 Valid, 1845 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-16 03:06:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2023-02-16 03:06:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 704. [2023-02-16 03:06:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 699 states have (on average 1.0987124463519313) internal successors, (768), 703 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 768 transitions. [2023-02-16 03:06:13,724 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 768 transitions. Word has length 269 [2023-02-16 03:06:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:13,724 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 768 transitions. [2023-02-16 03:06:13,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 768 transitions. [2023-02-16 03:06:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-02-16 03:06:13,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:13,732 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:13,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:13,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 03:06:13,939 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:06:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2023-02-16 03:06:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632817810] [2023-02-16 03:06:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:06:24,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632817810] [2023-02-16 03:06:24,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632817810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088985546] [2023-02-16 03:06:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:24,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:24,239 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) [2023-02-16 03:06:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:06:24,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:06:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 03:06:24,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:24,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:06:24,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:06:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-02-16 03:06:32,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2023-02-16 03:06:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088985546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:39,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2023-02-16 03:06:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860721671] [2023-02-16 03:06:39,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-02-16 03:06:39,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-02-16 03:06:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2023-02-16 03:06:39,840 INFO L87 Difference]: Start difference. First operand 704 states and 768 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:07:15,810 INFO L93 Difference]: Finished difference Result 2867 states and 3000 transitions. [2023-02-16 03:07:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2023-02-16 03:07:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 533 [2023-02-16 03:07:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:07:15,818 INFO L225 Difference]: With dead ends: 2867 [2023-02-16 03:07:15,818 INFO L226 Difference]: Without dead ends: 2867 [2023-02-16 03:07:15,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1461 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43620 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=53602, Invalid=106798, Unknown=0, NotChecked=0, Total=160400 [2023-02-16 03:07:15,828 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13436 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13436 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:07:15,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13436 Valid, 1329 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-16 03:07:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2023-02-16 03:07:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 707. [2023-02-16 03:07:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 703 states have (on average 1.0526315789473684) internal successors, (740), 706 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 740 transitions. [2023-02-16 03:07:15,842 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 740 transitions. Word has length 533 [2023-02-16 03:07:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:07:15,843 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 740 transitions. [2023-02-16 03:07:15,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 740 transitions. [2023-02-16 03:07:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2023-02-16 03:07:15,851 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:07:15,851 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:07:15,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:07:16,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 03:07:16,057 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-02-16 03:07:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:07:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 25239908, now seen corresponding path program 1 times [2023-02-16 03:07:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:07:16,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549458900] [2023-02-16 03:07:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:16,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:07:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34191 trivial. 0 not checked. [2023-02-16 03:07:16,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:07:16,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549458900] [2023-02-16 03:07:16,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549458900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:07:16,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907937825] [2023-02-16 03:07:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:16,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:07:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:07:16,585 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) [2023-02-16 03:07:16,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:07:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 133 conjunts are in the unsatisfiable core [2023-02-16 03:07:17,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:07:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:07:23,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:07:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:07:40,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907937825] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:07:40,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:07:40,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 134, 134] total 271 [2023-02-16 03:07:40,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851003147] [2023-02-16 03:07:40,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:07:40,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 271 states [2023-02-16 03:07:40,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:07:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 271 interpolants. [2023-02-16 03:07:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35790, Invalid=37380, Unknown=0, NotChecked=0, Total=73170 [2023-02-16 03:07:40,214 INFO L87 Difference]: Start difference. First operand 707 states and 740 transitions. Second operand has 271 states, 271 states have (on average 3.985239852398524) internal successors, (1080), 271 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)