./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c -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 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:45:25,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:45:25,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:45:25,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:45:25,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:45:25,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:45:25,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:45:25,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:45:25,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:45:25,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:45:25,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:45:25,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:45:25,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:45:25,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:45:25,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:45:25,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:45:25,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:45:25,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:45:25,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:45:25,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:45:25,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:45:25,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:45:25,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:45:25,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:45:25,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:45:25,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:45:25,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:45:25,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:45:25,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:45:25,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:45:25,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:45:25,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:45:25,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:45:25,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:45:25,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:45:25,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:45:25,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:45:25,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:45:25,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:45:25,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:45:25,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:45:25,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:45:25,465 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:45:25,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:45:25,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:45:25,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:45:25,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:45:25,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:45:25,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:45:25,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:45:25,468 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:45:25,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:45:25,469 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:45:25,469 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:45:25,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:45:25,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:45:25,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:45:25,470 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:45:25,470 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:45:25,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:45:25,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:45:25,471 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:45:25,471 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:45:25,471 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:45:25,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:45:25,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:45:25,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:45:25,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:45:25,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:45:25,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:45:25,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:45:25,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:45:25,473 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:45:25,473 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:45:25,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:45:25,473 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:45:25,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:45:25,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:45:25,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:45:25,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:45:25,786 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:45:25,786 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:45:25,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-09-01 01:45:26,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:45:27,206 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:45:27,208 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-09-01 01:45:27,223 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49162c28/dc4e1c0eb7464ea4830fe6bc90259ffb/FLAGb8de675b6 [2023-09-01 01:45:27,236 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49162c28/dc4e1c0eb7464ea4830fe6bc90259ffb [2023-09-01 01:45:27,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:45:27,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:45:27,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:45:27,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:45:27,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:45:27,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc155ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27, skipping insertion in model container [2023-09-01 01:45:27,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:45:27,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:45:27,496 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2023-09-01 01:45:27,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:45:27,524 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:45:27,583 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2023-09-01 01:45:27,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:45:27,618 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:45:27,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27 WrapperNode [2023-09-01 01:45:27,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:45:27,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:45:27,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:45:27,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:45:27,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,727 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-09-01 01:45:27,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:45:27,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:45:27,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:45:27,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:45:27,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:45:27,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:45:27,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:45:27,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:45:27,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (1/1) ... [2023-09-01 01:45:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:45:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:45:27,810 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) [2023-09-01 01:45:27,819 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 [2023-09-01 01:45:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:45:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:45:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 01:45:27,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 01:45:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:45:27,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:45:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:45:27,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:45:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:45:27,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:45:27,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 01:45:27,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:45:27,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:45:27,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:45:27,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:45:27,849 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:45:28,037 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:45:28,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:45:28,854 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:45:28,869 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:45:28,869 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:45:28,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:45:28 BoogieIcfgContainer [2023-09-01 01:45:28,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:45:28,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:45:28,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:45:28,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:45:28,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:45:27" (1/3) ... [2023-09-01 01:45:28,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69200bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:45:28, skipping insertion in model container [2023-09-01 01:45:28,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:27" (2/3) ... [2023-09-01 01:45:28,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69200bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:45:28, skipping insertion in model container [2023-09-01 01:45:28,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:45:28" (3/3) ... [2023-09-01 01:45:28,879 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-09-01 01:45:28,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:45:28,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-09-01 01:45:28,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:45:29,047 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:45:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 724 places, 787 transitions, 1598 flow [2023-09-01 01:45:29,360 INFO L130 PetriNetUnfolder]: 73/784 cut-off events. [2023-09-01 01:45:29,360 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:45:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 784 events. 73/784 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2897 event pairs, 0 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-09-01 01:45:29,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 724 places, 787 transitions, 1598 flow [2023-09-01 01:45:29,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 717 places, 780 transitions, 1578 flow [2023-09-01 01:45:29,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:45:29,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 717 places, 780 transitions, 1578 flow [2023-09-01 01:45:29,427 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 717 places, 780 transitions, 1578 flow [2023-09-01 01:45:29,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 717 places, 780 transitions, 1578 flow [2023-09-01 01:45:29,632 INFO L130 PetriNetUnfolder]: 73/780 cut-off events. [2023-09-01 01:45:29,632 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:45:29,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 780 events. 73/780 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2894 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-09-01 01:45:29,706 INFO L119 LiptonReduction]: Number of co-enabled transitions 196080 [2023-09-01 01:46:07,210 INFO L134 LiptonReduction]: Checked pairs total: 220167 [2023-09-01 01:46:07,211 INFO L136 LiptonReduction]: Total number of compositions: 1058 [2023-09-01 01:46:07,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:46:07,239 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;@2fe16a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:46:07,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2023-09-01 01:46:07,243 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:46:07,243 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:46:07,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:07,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:46:07,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:46:07,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash 111115, now seen corresponding path program 1 times [2023-09-01 01:46:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:07,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607035357] [2023-09-01 01:46:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:07,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:07,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607035357] [2023-09-01 01:46:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607035357] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:07,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:07,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:46:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23223800] [2023-09-01 01:46:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:46:07,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:46:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:46:07,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 722 out of 1845 [2023-09-01 01:46:07,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:07,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:07,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 722 of 1845 [2023-09-01 01:46:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:18,350 INFO L130 PetriNetUnfolder]: 71352/95312 cut-off events. [2023-09-01 01:46:18,350 INFO L131 PetriNetUnfolder]: For 1188/1188 co-relation queries the response was YES. [2023-09-01 01:46:18,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192063 conditions, 95312 events. 71352/95312 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 4078. Compared 579561 event pairs, 58845 based on Foata normal form. 0/29264 useless extension candidates. Maximal degree in co-relation 185500. Up to 95307 conditions per place. [2023-09-01 01:46:18,892 INFO L137 encePairwiseOnDemand]: 1818/1845 looper letters, 101 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2023-09-01 01:46:18,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 446 flow [2023-09-01 01:46:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2296 transitions. [2023-09-01 01:46:18,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-09-01 01:46:18,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2296 transitions. [2023-09-01 01:46:18,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2296 transitions. [2023-09-01 01:46:18,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:18,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2296 transitions. [2023-09-01 01:46:18,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 765.3333333333334) internal successors, (2296), 3 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:18,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:18,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:18,952 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 250 flow. Second operand 3 states and 2296 transitions. [2023-09-01 01:46:18,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 446 flow [2023-09-01 01:46:19,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 434 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:46:19,018 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 250 flow [2023-09-01 01:46:19,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2023-09-01 01:46:19,023 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -18 predicate places. [2023-09-01 01:46:19,023 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 250 flow [2023-09-01 01:46:19,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:19,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:19,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:46:19,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 01:46:19,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:46:19,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash 111114, now seen corresponding path program 1 times [2023-09-01 01:46:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623198681] [2023-09-01 01:46:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623198681] [2023-09-01 01:46:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623198681] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:19,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:19,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:46:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962296791] [2023-09-01 01:46:19,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:46:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:46:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:46:19,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 1845 [2023-09-01 01:46:19,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:19,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:19,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 1845 [2023-09-01 01:46:19,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:28,339 INFO L130 PetriNetUnfolder]: 71352/95306 cut-off events. [2023-09-01 01:46:28,339 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 01:46:28,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191229 conditions, 95306 events. 71352/95306 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4042. Compared 579057 event pairs, 58845 based on Foata normal form. 6/29272 useless extension candidates. Maximal degree in co-relation 191192. Up to 95306 conditions per place. [2023-09-01 01:46:28,741 INFO L137 encePairwiseOnDemand]: 1841/1845 looper letters, 100 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-09-01 01:46:28,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 446 flow [2023-09-01 01:46:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2285 transitions. [2023-09-01 01:46:28,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128274616079494 [2023-09-01 01:46:28,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2285 transitions. [2023-09-01 01:46:28,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2285 transitions. [2023-09-01 01:46:28,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:28,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2285 transitions. [2023-09-01 01:46:28,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 761.6666666666666) internal successors, (2285), 3 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:28,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:28,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:28,766 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 250 flow. Second operand 3 states and 2285 transitions. [2023-09-01 01:46:28,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 446 flow [2023-09-01 01:46:28,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:28,770 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 240 flow [2023-09-01 01:46:28,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2023-09-01 01:46:28,771 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-09-01 01:46:28,772 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 240 flow [2023-09-01 01:46:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:28,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:28,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:46:28,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 01:46:28,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:46:28,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash 3450404, now seen corresponding path program 1 times [2023-09-01 01:46:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:28,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884104478] [2023-09-01 01:46:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:28,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:28,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884104478] [2023-09-01 01:46:28,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884104478] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:28,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383770670] [2023-09-01 01:46:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:28,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:28,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:28,960 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) [2023-09-01 01:46:28,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 01:46:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:46:29,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:29,267 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:46:29,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:46:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:29,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383770670] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:29,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:29,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-09-01 01:46:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171467730] [2023-09-01 01:46:29,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:29,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:46:29,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:46:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:46:30,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 713 out of 1845 [2023-09-01 01:46:30,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:30,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:30,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 713 of 1845 [2023-09-01 01:46:30,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:55,600 INFO L130 PetriNetUnfolder]: 214054/285907 cut-off events. [2023-09-01 01:46:55,600 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2023-09-01 01:46:55,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573638 conditions, 285907 events. 214054/285907 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959339 event pairs, 176535 based on Foata normal form. 0/87787 useless extension candidates. Maximal degree in co-relation 573630. Up to 95304 conditions per place. [2023-09-01 01:46:56,709 INFO L137 encePairwiseOnDemand]: 1833/1845 looper letters, 273 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2023-09-01 01:46:56,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 292 transitions, 1256 flow [2023-09-01 01:46:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:46:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:46:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4584 transitions. [2023-09-01 01:46:56,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140921409214092 [2023-09-01 01:46:56,722 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4584 transitions. [2023-09-01 01:46:56,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4584 transitions. [2023-09-01 01:46:56,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:56,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4584 transitions. [2023-09-01 01:46:56,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 764.0) internal successors, (4584), 6 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:56,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:56,750 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:56,750 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 240 flow. Second operand 6 states and 4584 transitions. [2023-09-01 01:46:56,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 292 transitions, 1256 flow [2023-09-01 01:46:56,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 292 transitions, 1255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:56,758 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 381 flow [2023-09-01 01:46:56,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-09-01 01:46:56,760 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-09-01 01:46:56,760 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 381 flow [2023-09-01 01:46:56,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:56,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:56,762 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:46:56,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:56,968 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 [2023-09-01 01:46:56,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:46:56,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash -282431413, now seen corresponding path program 2 times [2023-09-01 01:46:56,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:56,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576334802] [2023-09-01 01:46:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:56,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:57,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576334802] [2023-09-01 01:46:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576334802] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249738776] [2023-09-01 01:46:57,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:46:57,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:57,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:57,229 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) [2023-09-01 01:46:57,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 01:46:57,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:46:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:46:57,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:46:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:57,438 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:46:57,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:46:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:57,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:46:57,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249738776] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:57,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:46:57,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-09-01 01:46:57,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903418496] [2023-09-01 01:46:57,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:57,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:46:57,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:46:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:46:58,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-09-01 01:46:58,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:58,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:58,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-09-01 01:46:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:23,967 INFO L130 PetriNetUnfolder]: 214054/285904 cut-off events. [2023-09-01 01:47:23,968 INFO L131 PetriNetUnfolder]: For 570/570 co-relation queries the response was YES. [2023-09-01 01:47:24,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573676 conditions, 285904 events. 214054/285904 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959645 event pairs, 176535 based on Foata normal form. 3/87795 useless extension candidates. Maximal degree in co-relation 573664. Up to 95300 conditions per place. [2023-09-01 01:47:25,247 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 270 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2023-09-01 01:47:25,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 289 transitions, 1321 flow [2023-09-01 01:47:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:47:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:47:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5367 transitions. [2023-09-01 01:47:25,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41556329849012774 [2023-09-01 01:47:25,259 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5367 transitions. [2023-09-01 01:47:25,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5367 transitions. [2023-09-01 01:47:25,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:25,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5367 transitions. [2023-09-01 01:47:25,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 766.7142857142857) internal successors, (5367), 7 states have internal predecessors, (5367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,289 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,289 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 381 flow. Second operand 7 states and 5367 transitions. [2023-09-01 01:47:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 289 transitions, 1321 flow [2023-09-01 01:47:25,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 289 transitions, 1289 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:47:25,295 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 357 flow [2023-09-01 01:47:25,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2023-09-01 01:47:25,296 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-09-01 01:47:25,296 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 357 flow [2023-09-01 01:47:25,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:25,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-09-01 01:47:25,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:25,503 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 [2023-09-01 01:47:25,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:25,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1912003009, now seen corresponding path program 1 times [2023-09-01 01:47:25,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:25,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239144983] [2023-09-01 01:47:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:25,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:47:25,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:25,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239144983] [2023-09-01 01:47:25,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239144983] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:47:25,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347121917] [2023-09-01 01:47:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:47:25,630 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) [2023-09-01 01:47:25,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 01:47:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:47:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:47:25,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:47:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347121917] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:25,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:47:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-09-01 01:47:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570438703] [2023-09-01 01:47:25,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:25,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:47:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:47:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:47:26,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-09-01 01:47:26,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:26,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:26,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-09-01 01:47:26,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:34,909 INFO L130 PetriNetUnfolder]: 71352/95315 cut-off events. [2023-09-01 01:47:34,910 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 01:47:35,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191292 conditions, 95315 events. 71352/95315 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4074. Compared 578795 event pairs, 58845 based on Foata normal form. 5/29284 useless extension candidates. Maximal degree in co-relation 191281. Up to 95301 conditions per place. [2023-09-01 01:47:35,284 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 92 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-09-01 01:47:35,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 567 flow [2023-09-01 01:47:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:47:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:47:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5200 transitions. [2023-09-01 01:47:35,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263259775454896 [2023-09-01 01:47:35,297 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5200 transitions. [2023-09-01 01:47:35,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5200 transitions. [2023-09-01 01:47:35,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:35,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5200 transitions. [2023-09-01 01:47:35,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 742.8571428571429) internal successors, (5200), 7 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,326 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,326 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 357 flow. Second operand 7 states and 5200 transitions. [2023-09-01 01:47:35,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 567 flow [2023-09-01 01:47:35,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 530 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 01:47:35,330 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 388 flow [2023-09-01 01:47:35,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2023-09-01 01:47:35,332 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2023-09-01 01:47:35,333 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 388 flow [2023-09-01 01:47:35,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:35,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:35,335 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:47:35,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:35,540 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 [2023-09-01 01:47:35,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:35,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:35,541 INFO L85 PathProgramCache]: Analyzing trace with hash -359831731, now seen corresponding path program 2 times [2023-09-01 01:47:35,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:35,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270413861] [2023-09-01 01:47:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:47:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:36,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270413861] [2023-09-01 01:47:36,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270413861] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:36,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:36,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:47:36,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925571169] [2023-09-01 01:47:36,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:36,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:47:36,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:47:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:47:36,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 1845 [2023-09-01 01:47:36,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:36,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:36,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 1845 [2023-09-01 01:47:36,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:43,598 INFO L130 PetriNetUnfolder]: 54076/72890 cut-off events. [2023-09-01 01:47:43,598 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2023-09-01 01:47:43,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146461 conditions, 72890 events. 54076/72890 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 3107. Compared 438501 event pairs, 44405 based on Foata normal form. 0/24247 useless extension candidates. Maximal degree in co-relation 146447. Up to 72890 conditions per place. [2023-09-01 01:47:43,930 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-09-01 01:47:43,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 590 flow [2023-09-01 01:47:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2282 transitions. [2023-09-01 01:47:43,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122854561878952 [2023-09-01 01:47:43,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2282 transitions. [2023-09-01 01:47:43,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2282 transitions. [2023-09-01 01:47:43,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:43,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2282 transitions. [2023-09-01 01:47:43,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 760.6666666666666) internal successors, (2282), 3 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:43,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:43,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:43,947 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 388 flow. Second operand 3 states and 2282 transitions. [2023-09-01 01:47:43,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 590 flow [2023-09-01 01:47:43,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 554 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 01:47:43,950 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 340 flow [2023-09-01 01:47:43,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2023-09-01 01:47:43,950 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-09-01 01:47:43,951 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 340 flow [2023-09-01 01:47:43,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:43,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:43,952 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:47:43,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 01:47:43,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:43,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash -359831729, now seen corresponding path program 1 times [2023-09-01 01:47:43,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:43,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123974316] [2023-09-01 01:47:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:43,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:47:44,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123974316] [2023-09-01 01:47:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123974316] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:44,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:47:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596469473] [2023-09-01 01:47:44,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:44,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:47:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:47:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:47:44,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-09-01 01:47:44,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:44,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:44,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-09-01 01:47:44,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:49,496 INFO L130 PetriNetUnfolder]: 36800/50465 cut-off events. [2023-09-01 01:47:49,496 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 01:47:49,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101590 conditions, 50465 events. 36800/50465 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 303387 event pairs, 29965 based on Foata normal form. 0/19215 useless extension candidates. Maximal degree in co-relation 101575. Up to 50465 conditions per place. [2023-09-01 01:47:49,939 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-09-01 01:47:49,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 538 flow [2023-09-01 01:47:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2256 transitions. [2023-09-01 01:47:49,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075880758807588 [2023-09-01 01:47:49,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2256 transitions. [2023-09-01 01:47:49,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2256 transitions. [2023-09-01 01:47:49,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:49,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2256 transitions. [2023-09-01 01:47:49,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 752.0) internal successors, (2256), 3 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:49,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:49,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:49,953 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 340 flow. Second operand 3 states and 2256 transitions. [2023-09-01 01:47:49,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 538 flow [2023-09-01 01:47:49,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:49,956 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 327 flow [2023-09-01 01:47:49,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2023-09-01 01:47:49,956 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2023-09-01 01:47:49,957 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 327 flow [2023-09-01 01:47:49,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:49,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:49,958 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 01:47:49,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:49,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135794, now seen corresponding path program 1 times [2023-09-01 01:47:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:49,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918725497] [2023-09-01 01:47:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:47:50,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:50,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918725497] [2023-09-01 01:47:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918725497] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:50,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:50,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:47:50,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656044543] [2023-09-01 01:47:50,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:50,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:47:50,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:47:50,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:47:50,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-09-01 01:47:50,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:50,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:50,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-09-01 01:47:50,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:55,260 INFO L130 PetriNetUnfolder]: 36246/49655 cut-off events. [2023-09-01 01:47:55,260 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 01:47:55,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99971 conditions, 49655 events. 36246/49655 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 296219 event pairs, 29511 based on Foata normal form. 0/19073 useless extension candidates. Maximal degree in co-relation 99955. Up to 49655 conditions per place. [2023-09-01 01:47:55,488 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 01:47:55,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 531 flow [2023-09-01 01:47:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2254 transitions. [2023-09-01 01:47:55,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40722673893405603 [2023-09-01 01:47:55,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2254 transitions. [2023-09-01 01:47:55,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2254 transitions. [2023-09-01 01:47:55,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:55,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2254 transitions. [2023-09-01 01:47:55,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 751.3333333333334) internal successors, (2254), 3 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:55,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:55,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:55,501 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 327 flow. Second operand 3 states and 2254 transitions. [2023-09-01 01:47:55,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 531 flow [2023-09-01 01:47:55,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:55,504 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 324 flow [2023-09-01 01:47:55,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2023-09-01 01:47:55,505 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -15 predicate places. [2023-09-01 01:47:55,505 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 324 flow [2023-09-01 01:47:55,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:55,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:55,506 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:55,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 01:47:55,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:55,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135793, now seen corresponding path program 1 times [2023-09-01 01:47:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:55,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183479664] [2023-09-01 01:47:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:47:56,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:56,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183479664] [2023-09-01 01:47:56,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183479664] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:47:56,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790360859] [2023-09-01 01:47:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:56,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:47:56,012 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) [2023-09-01 01:47:56,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 01:47:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:47:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:56,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:47:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:47:56,257 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 01:47:56,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 01:47:56,271 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 44 treesize of output 42 [2023-09-01 01:47:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:47:56,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:47:56,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:47:56,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:47:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:47:56,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:47:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790360859] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:56,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:47:56,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-09-01 01:47:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311765996] [2023-09-01 01:47:56,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:56,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:47:56,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:47:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:47:56,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 735 out of 1845 [2023-09-01 01:47:56,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:56,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:56,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 735 of 1845 [2023-09-01 01:47:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand