./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 AFTER --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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:53:04,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:53:04,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:53:04,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:53:04,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:53:04,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:53:04,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:53:04,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:53:04,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:53:04,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:53:04,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:53:04,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:53:04,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:53:04,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:53:04,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:53:04,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:53:04,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:53:04,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:53:04,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:53:04,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:53:04,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:53:04,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:53:04,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:53:04,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:53:04,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:53:04,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:53:04,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:53:04,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:53:04,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:53:04,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:53:04,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:53:04,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:53:04,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:53:04,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:53:04,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:53:04,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:53:04,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:53:04,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:53:04,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:53:04,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:53:04,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:53:04,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:53:04,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:53:04,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:53:04,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:53:04,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:53:04,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:53:04,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:53:04,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:53:04,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:53:04,413 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:53:04,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:53:04,414 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:53:04,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:53:04,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:53:04,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:53:04,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:53:04,415 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:53:04,416 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:53:04,416 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:53:04,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:53:04,416 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:53:04,416 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:53:04,417 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:53:04,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:53:04,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:53:04,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:53:04,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:53:04,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:53:04,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:53:04,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:53:04,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:53:04,418 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:53:04,418 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:53:04,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:53:04,419 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:53:04,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:53:04,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:53:04,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:53:04,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:53:04,732 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:53:04,733 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:53:04,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-29 22:53:05,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:53:06,124 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:53:06,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-29 22:53:06,136 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6befcd2/c366b92d67314fce86a542579021e424/FLAG2cca2feed [2023-08-29 22:53:06,148 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd6befcd2/c366b92d67314fce86a542579021e424 [2023-08-29 22:53:06,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:53:06,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:53:06,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:53:06,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:53:06,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:53:06,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e2a762a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06, skipping insertion in model container [2023-08-29 22:53:06,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:53:06,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:53:06,348 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] [2023-08-29 22:53:06,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:53:06,372 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:53:06,409 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] [2023-08-29 22:53:06,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:53:06,438 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:53:06,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06 WrapperNode [2023-08-29 22:53:06,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:53:06,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:53:06,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:53:06,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:53:06,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,524 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-08-29 22:53:06,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:53:06,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:53:06,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:53:06,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:53:06,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:53:06,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:53:06,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:53:06,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:53:06,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (1/1) ... [2023-08-29 22:53:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:53:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:53:06,654 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) [2023-08-29 22:53:06,681 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 [2023-08-29 22:53:06,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:53:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:53:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:53:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:53:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:53:06,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:53:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:53:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:53:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:53:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:53:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:53:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:53:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:53:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:53:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:53:06,703 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:53:06,877 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:53:06,878 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:53:07,685 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:53:07,704 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:53:07,709 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:53:07,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:53:07 BoogieIcfgContainer [2023-08-29 22:53:07,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:53:07,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:53:07,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:53:07,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:53:07,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:53:06" (1/3) ... [2023-08-29 22:53:07,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca4172b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:53:07, skipping insertion in model container [2023-08-29 22:53:07,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:06" (2/3) ... [2023-08-29 22:53:07,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca4172b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:53:07, skipping insertion in model container [2023-08-29 22:53:07,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:53:07" (3/3) ... [2023-08-29 22:53:07,720 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-08-29 22:53:07,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:53:07,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-08-29 22:53:07,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:53:07,952 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:53:08,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 724 places, 787 transitions, 1598 flow [2023-08-29 22:53:08,388 INFO L130 PetriNetUnfolder]: 73/784 cut-off events. [2023-08-29 22:53:08,388 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:53:08,409 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. [2023-08-29 22:53:08,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 724 places, 787 transitions, 1598 flow [2023-08-29 22:53:08,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 717 places, 780 transitions, 1578 flow [2023-08-29 22:53:08,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:53:08,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 717 places, 780 transitions, 1578 flow [2023-08-29 22:53:08,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 717 places, 780 transitions, 1578 flow [2023-08-29 22:53:08,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 717 places, 780 transitions, 1578 flow [2023-08-29 22:53:08,651 INFO L130 PetriNetUnfolder]: 73/780 cut-off events. [2023-08-29 22:53:08,651 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:53:08,664 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. [2023-08-29 22:53:08,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 196080 [2023-08-29 22:53:45,241 INFO L134 LiptonReduction]: Checked pairs total: 220167 [2023-08-29 22:53:45,242 INFO L136 LiptonReduction]: Total number of compositions: 1058 [2023-08-29 22:53:45,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:53:45,257 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;@278d01e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:53:45,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2023-08-29 22:53:45,259 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:53:45,259 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:53:45,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:45,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:53:45,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:53:45,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash 111115, now seen corresponding path program 1 times [2023-08-29 22:53:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:53:45,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244213311] [2023-08-29 22:53:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:53:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:45,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:53:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244213311] [2023-08-29 22:53:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244213311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:45,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:45,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:53:45,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595262638] [2023-08-29 22:53:45,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:53:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:53:45,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:53:45,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:53:45,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 722 out of 1845 [2023-08-29 22:53:45,922 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) [2023-08-29 22:53:45,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:45,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 722 of 1845 [2023-08-29 22:53:45,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:56,293 INFO L130 PetriNetUnfolder]: 71352/95312 cut-off events. [2023-08-29 22:53:56,294 INFO L131 PetriNetUnfolder]: For 1188/1188 co-relation queries the response was YES. [2023-08-29 22:53:56,405 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. [2023-08-29 22:53:56,799 INFO L137 encePairwiseOnDemand]: 1818/1845 looper letters, 101 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2023-08-29 22:53:56,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 446 flow [2023-08-29 22:53:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:53:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:53:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2296 transitions. [2023-08-29 22:53:56,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-08-29 22:53:56,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2296 transitions. [2023-08-29 22:53:56,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2296 transitions. [2023-08-29 22:53:56,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:56,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2296 transitions. [2023-08-29 22:53:56,844 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) [2023-08-29 22:53:56,859 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) [2023-08-29 22:53:56,862 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) [2023-08-29 22:53:56,864 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 250 flow. Second operand 3 states and 2296 transitions. [2023-08-29 22:53:56,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 446 flow [2023-08-29 22:53:56,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 434 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:53:56,981 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 250 flow [2023-08-29 22:53:56,983 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} [2023-08-29 22:53:56,987 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -18 predicate places. [2023-08-29 22:53:56,987 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 250 flow [2023-08-29 22:53:56,989 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) [2023-08-29 22:53:56,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:56,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:53:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:53:56,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:53:56,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash 111114, now seen corresponding path program 1 times [2023-08-29 22:53:57,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:53:57,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198014656] [2023-08-29 22:53:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:53:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:53:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:53:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:53:57,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:53:57,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198014656] [2023-08-29 22:53:57,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198014656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:53:57,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:53:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:53:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527737538] [2023-08-29 22:53:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:53:57,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:53:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:53:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:53:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:53:57,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 1845 [2023-08-29 22:53:57,235 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) [2023-08-29 22:53:57,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:57,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 1845 [2023-08-29 22:53:57,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:05,618 INFO L130 PetriNetUnfolder]: 71352/95306 cut-off events. [2023-08-29 22:54:05,619 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-29 22:54:05,705 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. [2023-08-29 22:54:06,043 INFO L137 encePairwiseOnDemand]: 1841/1845 looper letters, 100 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-08-29 22:54:06,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 446 flow [2023-08-29 22:54:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:54:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:54:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2285 transitions. [2023-08-29 22:54:06,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128274616079494 [2023-08-29 22:54:06,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2285 transitions. [2023-08-29 22:54:06,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2285 transitions. [2023-08-29 22:54:06,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:06,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2285 transitions. [2023-08-29 22:54:06,057 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) [2023-08-29 22:54:06,067 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) [2023-08-29 22:54:06,071 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) [2023-08-29 22:54:06,072 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 250 flow. Second operand 3 states and 2285 transitions. [2023-08-29 22:54:06,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 446 flow [2023-08-29 22:54:06,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:06,075 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 240 flow [2023-08-29 22:54:06,075 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} [2023-08-29 22:54:06,076 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-08-29 22:54:06,076 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 240 flow [2023-08-29 22:54:06,077 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) [2023-08-29 22:54:06,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:06,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:54:06,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:54:06,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:54:06,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:06,079 INFO L85 PathProgramCache]: Analyzing trace with hash 3450404, now seen corresponding path program 1 times [2023-08-29 22:54:06,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:54:06,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544175298] [2023-08-29 22:54:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:06,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:54:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:54:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544175298] [2023-08-29 22:54:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544175298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:54:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216433728] [2023-08-29 22:54:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:06,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:54:06,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:54:06,228 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) [2023-08-29 22:54:06,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:54:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:06,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:54:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:06,507 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:54:06,507 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 [2023-08-29 22:54:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:06,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:06,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216433728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:06,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:54:06,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 22:54:06,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573772983] [2023-08-29 22:54:06,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:06,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:54:06,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:54:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:54:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:54:07,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 713 out of 1845 [2023-08-29 22:54:07,376 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) [2023-08-29 22:54:07,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:07,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 713 of 1845 [2023-08-29 22:54:07,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:32,333 INFO L130 PetriNetUnfolder]: 214054/285907 cut-off events. [2023-08-29 22:54:32,333 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2023-08-29 22:54:32,612 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. [2023-08-29 22:54:33,603 INFO L137 encePairwiseOnDemand]: 1833/1845 looper letters, 273 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2023-08-29 22:54:33,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 292 transitions, 1256 flow [2023-08-29 22:54:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:54:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:54:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4584 transitions. [2023-08-29 22:54:33,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140921409214092 [2023-08-29 22:54:33,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4584 transitions. [2023-08-29 22:54:33,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4584 transitions. [2023-08-29 22:54:33,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:33,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4584 transitions. [2023-08-29 22:54:33,629 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) [2023-08-29 22:54:33,645 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) [2023-08-29 22:54:33,648 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) [2023-08-29 22:54:33,648 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 240 flow. Second operand 6 states and 4584 transitions. [2023-08-29 22:54:33,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 292 transitions, 1256 flow [2023-08-29 22:54:33,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 292 transitions, 1255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:33,654 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 381 flow [2023-08-29 22:54:33,654 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} [2023-08-29 22:54:33,655 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-29 22:54:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 381 flow [2023-08-29 22:54:33,657 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) [2023-08-29 22:54:33,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:33,657 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:54:33,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:33,863 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 [2023-08-29 22:54:33,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:54:33,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -282431413, now seen corresponding path program 2 times [2023-08-29 22:54:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:54:33,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183905365] [2023-08-29 22:54:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:33,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:54:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:34,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:54:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183905365] [2023-08-29 22:54:34,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183905365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:54:34,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094977734] [2023-08-29 22:54:34,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:54:34,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:54:34,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:54:34,173 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) [2023-08-29 22:54:34,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:54:34,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:54:34,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:54:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:54:34,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:34,373 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:54:34,373 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 [2023-08-29 22:54:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:34,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:34,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094977734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:34,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:54:34,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-08-29 22:54:34,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241854587] [2023-08-29 22:54:34,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:34,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:54:34,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:54:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:54:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:54:35,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-08-29 22:54:35,061 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) [2023-08-29 22:54:35,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:35,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-08-29 22:54:35,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:00,301 INFO L130 PetriNetUnfolder]: 214054/285904 cut-off events. [2023-08-29 22:55:00,302 INFO L131 PetriNetUnfolder]: For 570/570 co-relation queries the response was YES. [2023-08-29 22:55:00,703 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. [2023-08-29 22:55:01,478 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 270 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2023-08-29 22:55:01,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 289 transitions, 1321 flow [2023-08-29 22:55:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:55:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:55:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5367 transitions. [2023-08-29 22:55:01,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41556329849012774 [2023-08-29 22:55:01,490 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5367 transitions. [2023-08-29 22:55:01,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5367 transitions. [2023-08-29 22:55:01,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:01,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5367 transitions. [2023-08-29 22:55:01,503 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) [2023-08-29 22:55:01,518 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) [2023-08-29 22:55:01,520 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) [2023-08-29 22:55:01,521 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 381 flow. Second operand 7 states and 5367 transitions. [2023-08-29 22:55:01,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 289 transitions, 1321 flow [2023-08-29 22:55:01,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 289 transitions, 1289 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:55:01,526 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 357 flow [2023-08-29 22:55:01,527 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} [2023-08-29 22:55:01,527 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-29 22:55:01,527 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 357 flow [2023-08-29 22:55:01,529 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) [2023-08-29 22:55:01,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:01,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-08-29 22:55:01,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:01,735 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 [2023-08-29 22:55:01,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:01,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1912003009, now seen corresponding path program 1 times [2023-08-29 22:55:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:01,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917824748] [2023-08-29 22:55:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:01,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:55:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917824748] [2023-08-29 22:55:01,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917824748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:01,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136010691] [2023-08-29 22:55:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:01,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:01,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:01,852 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) [2023-08-29 22:55:01,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:55:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:01,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:55:01,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:55:02,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:55:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136010691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:02,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:02,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-29 22:55:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241842568] [2023-08-29 22:55:02,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:55:02,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:55:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:55:02,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-08-29 22:55:02,271 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) [2023-08-29 22:55:02,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:02,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-08-29 22:55:02,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:10,859 INFO L130 PetriNetUnfolder]: 71352/95315 cut-off events. [2023-08-29 22:55:10,859 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-29 22:55:10,999 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. [2023-08-29 22:55:11,243 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 92 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-08-29 22:55:11,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 567 flow [2023-08-29 22:55:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:55:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:55:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5200 transitions. [2023-08-29 22:55:11,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263259775454896 [2023-08-29 22:55:11,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5200 transitions. [2023-08-29 22:55:11,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5200 transitions. [2023-08-29 22:55:11,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:11,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5200 transitions. [2023-08-29 22:55:11,265 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) [2023-08-29 22:55:11,277 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) [2023-08-29 22:55:11,279 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) [2023-08-29 22:55:11,279 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 357 flow. Second operand 7 states and 5200 transitions. [2023-08-29 22:55:11,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 567 flow [2023-08-29 22:55:11,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 530 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-29 22:55:11,282 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 388 flow [2023-08-29 22:55:11,282 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} [2023-08-29 22:55:11,283 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2023-08-29 22:55:11,283 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 388 flow [2023-08-29 22:55:11,285 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) [2023-08-29 22:55:11,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:11,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:55:11,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:11,490 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 [2023-08-29 22:55:11,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:11,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -359831731, now seen corresponding path program 2 times [2023-08-29 22:55:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:11,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340998810] [2023-08-29 22:55:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:55:12,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340998810] [2023-08-29 22:55:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340998810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:12,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:12,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:55:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44325259] [2023-08-29 22:55:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:12,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:55:12,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 1845 [2023-08-29 22:55:12,253 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) [2023-08-29 22:55:12,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:12,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 1845 [2023-08-29 22:55:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:19,216 INFO L130 PetriNetUnfolder]: 54076/72890 cut-off events. [2023-08-29 22:55:19,216 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2023-08-29 22:55:19,365 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. [2023-08-29 22:55:19,546 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-29 22:55:19,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 590 flow [2023-08-29 22:55:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2282 transitions. [2023-08-29 22:55:19,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122854561878952 [2023-08-29 22:55:19,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2282 transitions. [2023-08-29 22:55:19,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2282 transitions. [2023-08-29 22:55:19,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:19,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2282 transitions. [2023-08-29 22:55:19,554 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) [2023-08-29 22:55:19,560 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) [2023-08-29 22:55:19,561 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) [2023-08-29 22:55:19,561 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 388 flow. Second operand 3 states and 2282 transitions. [2023-08-29 22:55:19,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 590 flow [2023-08-29 22:55:19,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 554 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-29 22:55:19,564 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 340 flow [2023-08-29 22:55:19,564 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} [2023-08-29 22:55:19,565 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-29 22:55:19,565 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 340 flow [2023-08-29 22:55:19,566 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) [2023-08-29 22:55:19,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:19,566 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:55:19,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:55:19,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:19,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash -359831729, now seen corresponding path program 1 times [2023-08-29 22:55:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091500529] [2023-08-29 22:55:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:19,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:55:20,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:20,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091500529] [2023-08-29 22:55:20,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091500529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:20,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:55:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228092067] [2023-08-29 22:55:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:20,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:55:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:55:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:55:20,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-08-29 22:55:20,381 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) [2023-08-29 22:55:20,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:20,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-08-29 22:55:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:25,413 INFO L130 PetriNetUnfolder]: 36800/50465 cut-off events. [2023-08-29 22:55:25,414 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:55:25,520 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. [2023-08-29 22:55:25,658 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-29 22:55:25,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 538 flow [2023-08-29 22:55:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2256 transitions. [2023-08-29 22:55:25,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075880758807588 [2023-08-29 22:55:25,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2256 transitions. [2023-08-29 22:55:25,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2256 transitions. [2023-08-29 22:55:25,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:25,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2256 transitions. [2023-08-29 22:55:25,665 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) [2023-08-29 22:55:25,670 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) [2023-08-29 22:55:25,672 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) [2023-08-29 22:55:25,672 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 340 flow. Second operand 3 states and 2256 transitions. [2023-08-29 22:55:25,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 538 flow [2023-08-29 22:55:25,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:25,675 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 327 flow [2023-08-29 22:55:25,675 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} [2023-08-29 22:55:25,675 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2023-08-29 22:55:25,676 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 327 flow [2023-08-29 22:55:25,677 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) [2023-08-29 22:55:25,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:25,677 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:25,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:55:25,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:25,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135794, now seen corresponding path program 1 times [2023-08-29 22:55:25,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:25,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553367280] [2023-08-29 22:55:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:25,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:55:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553367280] [2023-08-29 22:55:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553367280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:25,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:55:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278033601] [2023-08-29 22:55:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:25,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:55:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:55:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:55:26,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-08-29 22:55:26,257 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) [2023-08-29 22:55:26,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:26,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-08-29 22:55:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:30,868 INFO L130 PetriNetUnfolder]: 36246/49655 cut-off events. [2023-08-29 22:55:30,868 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:55:30,982 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. [2023-08-29 22:55:31,107 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-29 22:55:31,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 531 flow [2023-08-29 22:55:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2254 transitions. [2023-08-29 22:55:31,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40722673893405603 [2023-08-29 22:55:31,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2254 transitions. [2023-08-29 22:55:31,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2254 transitions. [2023-08-29 22:55:31,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:31,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2254 transitions. [2023-08-29 22:55:31,114 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) [2023-08-29 22:55:31,117 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) [2023-08-29 22:55:31,118 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) [2023-08-29 22:55:31,119 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 327 flow. Second operand 3 states and 2254 transitions. [2023-08-29 22:55:31,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 531 flow [2023-08-29 22:55:31,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:31,121 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 324 flow [2023-08-29 22:55:31,122 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} [2023-08-29 22:55:31,122 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -15 predicate places. [2023-08-29 22:55:31,122 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 324 flow [2023-08-29 22:55:31,123 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) [2023-08-29 22:55:31,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:31,123 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:31,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:55:31,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:31,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135793, now seen corresponding path program 1 times [2023-08-29 22:55:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:31,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82830476] [2023-08-29 22:55:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:55:31,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82830476] [2023-08-29 22:55:31,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82830476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:31,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638443130] [2023-08-29 22:55:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:31,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:31,573 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) [2023-08-29 22:55:31,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:55:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:55:31,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:55:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:55:31,814 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 22:55:31,815 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 [2023-08-29 22:55:31,828 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 [2023-08-29 22:55:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:55:31,903 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 [2023-08-29 22:55:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:55:31,938 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 [2023-08-29 22:55:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:55:31,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:55:31,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638443130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:31,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:55:31,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-08-29 22:55:31,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444724107] [2023-08-29 22:55:31,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:31,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:31,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:55:32,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 735 out of 1845 [2023-08-29 22:55:32,140 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) [2023-08-29 22:55:32,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:32,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 735 of 1845 [2023-08-29 22:55:32,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:36,955 INFO L130 PetriNetUnfolder]: 35692/48845 cut-off events. [2023-08-29 22:55:36,955 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:55:37,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98352 conditions, 48845 events. 35692/48845 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 291352 event pairs, 29057 based on Foata normal form. 0/18931 useless extension candidates. Maximal degree in co-relation 98335. Up to 48845 conditions per place. [2023-08-29 22:55:37,195 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 101 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-29 22:55:37,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 524 flow [2023-08-29 22:55:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2294 transitions. [2023-08-29 22:55:37,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445347786811204 [2023-08-29 22:55:37,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2294 transitions. [2023-08-29 22:55:37,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2294 transitions. [2023-08-29 22:55:37,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:37,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2294 transitions. [2023-08-29 22:55:37,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 764.6666666666666) internal successors, (2294), 3 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:37,206 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) [2023-08-29 22:55:37,207 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) [2023-08-29 22:55:37,208 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 324 flow. Second operand 3 states and 2294 transitions. [2023-08-29 22:55:37,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 524 flow [2023-08-29 22:55:37,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:37,210 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 321 flow [2023-08-29 22:55:37,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2023-08-29 22:55:37,211 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -16 predicate places. [2023-08-29 22:55:37,211 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 321 flow [2023-08-29 22:55:37,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-29 22:55:37,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:37,212 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:37,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:37,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:37,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:37,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash 493713100, now seen corresponding path program 1 times [2023-08-29 22:55:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605092810] [2023-08-29 22:55:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:37,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605092810] [2023-08-29 22:55:37,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605092810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792024491] [2023-08-29 22:55:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:37,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:37,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:37,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:37,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:55:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:37,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 22:55:37,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:37,962 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:55:38,093 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:55:38,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:55:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:38,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792024491] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:38,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:38,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-08-29 22:55:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962239168] [2023-08-29 22:55:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:38,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:55:38,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:55:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-08-29 22:55:39,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 1845 [2023-08-29 22:55:39,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:39,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:39,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 1845 [2023-08-29 22:55:39,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:48,408 INFO L130 PetriNetUnfolder]: 64726/88717 cut-off events. [2023-08-29 22:55:48,409 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:55:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178583 conditions, 88717 events. 64726/88717 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 565802 event pairs, 29057 based on Foata normal form. 0/34905 useless extension candidates. Maximal degree in co-relation 178565. Up to 48257 conditions per place. [2023-08-29 22:55:48,881 INFO L137 encePairwiseOnDemand]: 1837/1845 looper letters, 171 selfloop transitions, 5 changer transitions 0/176 dead transitions. [2023-08-29 22:55:48,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 826 flow [2023-08-29 22:55:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:55:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:55:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3704 transitions. [2023-08-29 22:55:48,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40151761517615175 [2023-08-29 22:55:48,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3704 transitions. [2023-08-29 22:55:48,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3704 transitions. [2023-08-29 22:55:48,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:48,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3704 transitions. [2023-08-29 22:55:48,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 740.8) internal successors, (3704), 5 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:48,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:48,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:48,898 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 321 flow. Second operand 5 states and 3704 transitions. [2023-08-29 22:55:48,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 826 flow [2023-08-29 22:55:48,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 176 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:48,902 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 351 flow [2023-08-29 22:55:48,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2023-08-29 22:55:48,904 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -11 predicate places. [2023-08-29 22:55:48,904 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 351 flow [2023-08-29 22:55:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:48,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:48,905 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:48,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:49,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-29 22:55:49,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:49,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 493713097, now seen corresponding path program 1 times [2023-08-29 22:55:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:49,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976230878] [2023-08-29 22:55:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:49,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-08-29 22:55:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976230878] [2023-08-29 22:55:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976230878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:49,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:49,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:55:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478665186] [2023-08-29 22:55:49,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:49,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:55:49,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:49,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:55:49,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:55:49,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1845 [2023-08-29 22:55:49,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 712.4) internal successors, (3562), 5 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:49,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:49,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1845 [2023-08-29 22:55:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:56,314 INFO L130 PetriNetUnfolder]: 47558/64969 cut-off events. [2023-08-29 22:55:56,314 INFO L131 PetriNetUnfolder]: For 3251/3251 co-relation queries the response was YES. [2023-08-29 22:55:56,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136139 conditions, 64969 events. 47558/64969 cut-off events. For 3251/3251 co-relation queries the response was YES. Maximal size of possible extension queue 1503. Compared 392647 event pairs, 38507 based on Foata normal form. 0/29597 useless extension candidates. Maximal degree in co-relation 136118. Up to 64962 conditions per place. [2023-08-29 22:55:56,687 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 95 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-08-29 22:55:56,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 97 transitions, 531 flow [2023-08-29 22:55:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:55:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:55:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2927 transitions. [2023-08-29 22:55:56,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966124661246612 [2023-08-29 22:55:56,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2927 transitions. [2023-08-29 22:55:56,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2927 transitions. [2023-08-29 22:55:56,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:56,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2927 transitions. [2023-08-29 22:55:56,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 731.75) internal successors, (2927), 4 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:56,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:56,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:56,699 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 351 flow. Second operand 4 states and 2927 transitions. [2023-08-29 22:55:56,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 97 transitions, 531 flow [2023-08-29 22:55:56,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:56,703 INFO L231 Difference]: Finished difference. Result has 96 places, 97 transitions, 338 flow [2023-08-29 22:55:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=96, PETRI_TRANSITIONS=97} [2023-08-29 22:55:56,703 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -17 predicate places. [2023-08-29 22:55:56,703 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 97 transitions, 338 flow [2023-08-29 22:55:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 712.4) internal successors, (3562), 5 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:56,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:56,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:56,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:55:56,705 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:55:56,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash 493713099, now seen corresponding path program 1 times [2023-08-29 22:55:56,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:56,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774376078] [2023-08-29 22:55:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:55:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:56,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774376078] [2023-08-29 22:55:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774376078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:56,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:56,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:55:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094673103] [2023-08-29 22:55:56,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:55:56,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:55:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:55:57,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1845 [2023-08-29 22:55:57,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 97 transitions, 338 flow. Second operand has 5 states, 5 states have (on average 712.2) internal successors, (3561), 5 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:57,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:57,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1845 [2023-08-29 22:55:57,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:02,207 INFO L130 PetriNetUnfolder]: 36122/49289 cut-off events. [2023-08-29 22:56:02,207 INFO L131 PetriNetUnfolder]: For 2942/2942 co-relation queries the response was YES. [2023-08-29 22:56:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104158 conditions, 49289 events. 36122/49289 cut-off events. For 2942/2942 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 285593 event pairs, 28735 based on Foata normal form. 0/24245 useless extension candidates. Maximal degree in co-relation 104137. Up to 49275 conditions per place. [2023-08-29 22:56:02,483 INFO L137 encePairwiseOnDemand]: 1839/1845 looper letters, 91 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-29 22:56:02,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 516 flow [2023-08-29 22:56:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:56:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:56:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2920 transitions. [2023-08-29 22:56:02,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2023-08-29 22:56:02,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2920 transitions. [2023-08-29 22:56:02,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2920 transitions. [2023-08-29 22:56:02,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:02,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2920 transitions. [2023-08-29 22:56:02,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:02,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:02,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:02,495 INFO L175 Difference]: Start difference. First operand has 96 places, 97 transitions, 338 flow. Second operand 4 states and 2920 transitions. [2023-08-29 22:56:02,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 516 flow [2023-08-29 22:56:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:56:02,500 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 331 flow [2023-08-29 22:56:02,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2023-08-29 22:56:02,501 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-08-29 22:56:02,501 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 331 flow [2023-08-29 22:56:02,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 712.2) internal successors, (3561), 5 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:02,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:02,502 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:02,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 22:56:02,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:56:02,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash 493713098, now seen corresponding path program 1 times [2023-08-29 22:56:02,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:02,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770617657] [2023-08-29 22:56:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:56:03,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:03,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770617657] [2023-08-29 22:56:03,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770617657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:56:03,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905700596] [2023-08-29 22:56:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:03,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:56:03,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:56:03,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:56:03,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 22:56:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:03,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 22:56:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:03,451 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:56:03,451 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 [2023-08-29 22:56:03,501 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:56:03,502 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 [2023-08-29 22:56:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:56:03,667 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 [2023-08-29 22:56:03,675 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:56:03,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 22:56:03,731 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:56:03,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:56:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:03,809 INFO L328 TraceCheckSpWp]: Computing backward predicates...