./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:15:27,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:15:27,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:15:27,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:15:27,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:15:27,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:15:27,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:15:27,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:15:27,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:15:27,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:15:27,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:15:27,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:15:27,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:15:27,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:15:27,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:15:27,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:15:27,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:15:27,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:15:27,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:15:27,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:15:27,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:15:27,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:15:27,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:15:27,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:15:27,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:15:27,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:15:27,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:15:27,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:15:27,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:15:27,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:15:27,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:15:27,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:15:27,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:15:27,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:15:27,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:15:27,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:15:27,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:15:27,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:15:27,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:15:27,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:15:27,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:15:27,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:15:27,190 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:15:27,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:15:27,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:15:27,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:15:27,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:15:27,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:15:27,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:15:27,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:15:27,193 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:15:27,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:15:27,194 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:15:27,194 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:15:27,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:15:27,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:15:27,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:15:27,195 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:15:27,195 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:15:27,196 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:15:27,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:15:27,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:15:27,196 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:15:27,197 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:15:27,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:15:27,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:15:27,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:15:27,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:15:27,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:15:27,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:15:27,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:15:27,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:15:27,202 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:15:27,203 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:15:27,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:15:27,203 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:15:27,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:15:27,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:15:27,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:15:27,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:15:27,523 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:15:27,523 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:15:27,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-08-30 04:15:28,840 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:15:29,102 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:15:29,103 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-08-30 04:15:29,120 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5916e6e5e/3acdad209162491a85e3accfa11daceb/FLAG23d3b5fe3 [2023-08-30 04:15:29,135 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5916e6e5e/3acdad209162491a85e3accfa11daceb [2023-08-30 04:15:29,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:15:29,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:15:29,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:15:29,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:15:29,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:15:29,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dadc502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29, skipping insertion in model container [2023-08-30 04:15:29,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:15:29,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:15:29,631 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-08-30 04:15:29,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:15:29,699 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:15:29,758 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-08-30 04:15:29,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:15:29,829 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:15:29,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29 WrapperNode [2023-08-30 04:15:29,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:15:29,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:15:29,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:15:29,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:15:29,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,906 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-08-30 04:15:29,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:15:29,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:15:29,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:15:29,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:15:29,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:15:29,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:15:29,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:15:29,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:15:29,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (1/1) ... [2023-08-30 04:15:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:15:30,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:30,023 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) [2023-08-30 04:15:30,049 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 [2023-08-30 04:15:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:15:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:15:30,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:15:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:15:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:15:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:15:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:15:30,064 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:15:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:15:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:15:30,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:15:30,066 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:15:30,226 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:15:30,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:15:30,636 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:15:30,645 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:15:30,646 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-30 04:15:30,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:15:30 BoogieIcfgContainer [2023-08-30 04:15:30,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:15:30,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:15:30,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:15:30,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:15:30,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:15:29" (1/3) ... [2023-08-30 04:15:30,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dfc3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:15:30, skipping insertion in model container [2023-08-30 04:15:30,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:29" (2/3) ... [2023-08-30 04:15:30,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dfc3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:15:30, skipping insertion in model container [2023-08-30 04:15:30,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:15:30" (3/3) ... [2023-08-30 04:15:30,656 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-08-30 04:15:30,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:15:30,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 04:15:30,669 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:15:30,744 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:15:30,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 284 transitions, 576 flow [2023-08-30 04:15:30,935 INFO L130 PetriNetUnfolder]: 73/446 cut-off events. [2023-08-30 04:15:30,936 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:30,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 446 events. 73/446 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2298 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 04:15:30,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 284 transitions, 576 flow [2023-08-30 04:15:30,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 284 transitions, 576 flow [2023-08-30 04:15:30,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:15:30,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 284 transitions, 576 flow [2023-08-30 04:15:30,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 284 transitions, 576 flow [2023-08-30 04:15:30,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 284 transitions, 576 flow [2023-08-30 04:15:31,031 INFO L130 PetriNetUnfolder]: 73/446 cut-off events. [2023-08-30 04:15:31,031 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:31,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 446 events. 73/446 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2298 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 04:15:31,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 26544 [2023-08-30 04:15:35,255 INFO L134 LiptonReduction]: Checked pairs total: 53426 [2023-08-30 04:15:35,255 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-08-30 04:15:35,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:15:35,274 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;@4a212105, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:15:35,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:15:35,278 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:15:35,278 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:15:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:15:35,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:35,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:35,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1105630, now seen corresponding path program 1 times [2023-08-30 04:15:35,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:35,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140421133] [2023-08-30 04:15:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:35,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:35,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:35,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140421133] [2023-08-30 04:15:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140421133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:35,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:35,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:35,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516720518] [2023-08-30 04:15:35,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:35,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:35,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 543 [2023-08-30 04:15:35,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:35,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:35,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 543 [2023-08-30 04:15:35,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:36,028 INFO L130 PetriNetUnfolder]: 1102/2408 cut-off events. [2023-08-30 04:15:36,028 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:36,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 2408 events. 1102/2408 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17546 event pairs, 940 based on Foata normal form. 184/1699 useless extension candidates. Maximal degree in co-relation 4358. Up to 2070 conditions per place. [2023-08-30 04:15:36,046 INFO L137 encePairwiseOnDemand]: 499/543 looper letters, 74 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 04:15:36,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 348 flow [2023-08-30 04:15:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2023-08-30 04:15:36,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089011663597299 [2023-08-30 04:15:36,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2023-08-30 04:15:36,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2023-08-30 04:15:36,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:36,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2023-08-30 04:15:36,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,110 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 276 flow. Second operand 3 states and 829 transitions. [2023-08-30 04:15:36,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 348 flow [2023-08-30 04:15:36,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:15:36,119 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 206 flow [2023-08-30 04:15:36,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-30 04:15:36,125 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-08-30 04:15:36,126 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 206 flow [2023-08-30 04:15:36,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:36,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:15:36,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:15:36,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:36,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash 34306258, now seen corresponding path program 1 times [2023-08-30 04:15:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:36,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159466039] [2023-08-30 04:15:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:36,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159466039] [2023-08-30 04:15:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159466039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441680849] [2023-08-30 04:15:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:36,225 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) [2023-08-30 04:15:36,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:15:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:15:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:36,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:36,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441680849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:36,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:36,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:15:36,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593473473] [2023-08-30 04:15:36,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:36,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:15:36,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:36,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:15:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:15:36,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 543 [2023-08-30 04:15:36,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 237.28571428571428) internal successors, (1661), 7 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:36,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 543 [2023-08-30 04:15:36,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:36,880 INFO L130 PetriNetUnfolder]: 1102/2411 cut-off events. [2023-08-30 04:15:36,880 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:36,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 2411 events. 1102/2411 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17503 event pairs, 940 based on Foata normal form. 0/1518 useless extension candidates. Maximal degree in co-relation 4490. Up to 2070 conditions per place. [2023-08-30 04:15:36,893 INFO L137 encePairwiseOnDemand]: 540/543 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-30 04:15:36,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 376 flow [2023-08-30 04:15:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:15:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:15:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1498 transitions. [2023-08-30 04:15:36,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597912829957029 [2023-08-30 04:15:36,898 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1498 transitions. [2023-08-30 04:15:36,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1498 transitions. [2023-08-30 04:15:36,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:36,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1498 transitions. [2023-08-30 04:15:36,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,908 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,908 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 206 flow. Second operand 6 states and 1498 transitions. [2023-08-30 04:15:36,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 376 flow [2023-08-30 04:15:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 372 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:36,913 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 238 flow [2023-08-30 04:15:36,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-30 04:15:36,914 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-30 04:15:36,914 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 238 flow [2023-08-30 04:15:36,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 237.28571428571428) internal successors, (1661), 7 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:36,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:36,916 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:36,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:37,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:37,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:37,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash -152978466, now seen corresponding path program 2 times [2023-08-30 04:15:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:37,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605951445] [2023-08-30 04:15:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:37,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:37,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:37,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605951445] [2023-08-30 04:15:37,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605951445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:37,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278243637] [2023-08-30 04:15:37,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:15:37,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:37,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:37,294 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) [2023-08-30 04:15:37,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:15:37,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:15:37,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:15:37,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:15:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:37,422 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 [2023-08-30 04:15:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:15:37,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:15:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278243637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:37,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:15:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 04:15:37,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887389938] [2023-08-30 04:15:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:37,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:15:37,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 543 [2023-08-30 04:15:37,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:37,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:37,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 543 [2023-08-30 04:15:37,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:37,829 INFO L130 PetriNetUnfolder]: 1053/2271 cut-off events. [2023-08-30 04:15:37,829 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:15:37,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 2271 events. 1053/2271 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16982 event pairs, 0 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 4320. Up to 2009 conditions per place. [2023-08-30 04:15:37,840 INFO L137 encePairwiseOnDemand]: 539/543 looper letters, 100 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-30 04:15:37,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 488 flow [2023-08-30 04:15:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2023-08-30 04:15:37,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960098219766728 [2023-08-30 04:15:37,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2023-08-30 04:15:37,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2023-08-30 04:15:37,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:37,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2023-08-30 04:15:37,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:37,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:37,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:37,850 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 238 flow. Second operand 3 states and 808 transitions. [2023-08-30 04:15:37,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 488 flow [2023-08-30 04:15:37,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 474 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:37,855 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 234 flow [2023-08-30 04:15:37,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=98, 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=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-08-30 04:15:37,856 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2023-08-30 04:15:37,856 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 234 flow [2023-08-30 04:15:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:37,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:37,857 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:37,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 04:15:38,062 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,SelfDestructingSolverStorable2 [2023-08-30 04:15:38,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:38,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash -152978465, now seen corresponding path program 1 times [2023-08-30 04:15:38,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:38,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384722632] [2023-08-30 04:15:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:15:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384722632] [2023-08-30 04:15:38,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384722632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:38,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:38,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129806109] [2023-08-30 04:15:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:38,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:38,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:38,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 543 [2023-08-30 04:15:38,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:38,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 543 [2023-08-30 04:15:38,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:38,494 INFO L130 PetriNetUnfolder]: 1050/2235 cut-off events. [2023-08-30 04:15:38,494 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 04:15:38,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4293 conditions, 2235 events. 1050/2235 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15923 event pairs, 860 based on Foata normal form. 0/1479 useless extension candidates. Maximal degree in co-relation 4264. Up to 1855 conditions per place. [2023-08-30 04:15:38,508 INFO L137 encePairwiseOnDemand]: 538/543 looper letters, 95 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-08-30 04:15:38,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 468 flow [2023-08-30 04:15:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 795 transitions. [2023-08-30 04:15:38,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880294659300184 [2023-08-30 04:15:38,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 795 transitions. [2023-08-30 04:15:38,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 795 transitions. [2023-08-30 04:15:38,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:38,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 795 transitions. [2023-08-30 04:15:38,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,517 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 234 flow. Second operand 3 states and 795 transitions. [2023-08-30 04:15:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 468 flow [2023-08-30 04:15:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 116 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:38,521 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 232 flow [2023-08-30 04:15:38,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2023-08-30 04:15:38,522 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-30 04:15:38,522 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 232 flow [2023-08-30 04:15:38,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:38,523 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:38,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:15:38,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:38,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -420381068, now seen corresponding path program 1 times [2023-08-30 04:15:38,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:38,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184202679] [2023-08-30 04:15:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:38,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:15:38,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:38,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184202679] [2023-08-30 04:15:38,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184202679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:38,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583625070] [2023-08-30 04:15:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:38,595 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) [2023-08-30 04:15:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:15:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:15:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:15:38,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:15:38,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583625070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:38,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:38,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:15:38,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105094944] [2023-08-30 04:15:38,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:15:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:15:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:15:38,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 543 [2023-08-30 04:15:38,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 232 flow. Second operand has 13 states, 13 states have (on average 237.3846153846154) internal successors, (3086), 13 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:38,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 543 [2023-08-30 04:15:38,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:39,087 INFO L130 PetriNetUnfolder]: 1052/2243 cut-off events. [2023-08-30 04:15:39,087 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-30 04:15:39,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4342 conditions, 2243 events. 1052/2243 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15945 event pairs, 900 based on Foata normal form. 6/1514 useless extension candidates. Maximal degree in co-relation 4289. Up to 1944 conditions per place. [2023-08-30 04:15:39,105 INFO L137 encePairwiseOnDemand]: 540/543 looper letters, 72 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-08-30 04:15:39,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 434 flow [2023-08-30 04:15:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:15:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:15:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2921 transitions. [2023-08-30 04:15:39,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44828115408225905 [2023-08-30 04:15:39,130 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2921 transitions. [2023-08-30 04:15:39,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2921 transitions. [2023-08-30 04:15:39,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:39,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2921 transitions. [2023-08-30 04:15:39,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.41666666666666) internal successors, (2921), 12 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 543.0) internal successors, (7059), 13 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,155 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 543.0) internal successors, (7059), 13 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,155 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 232 flow. Second operand 12 states and 2921 transitions. [2023-08-30 04:15:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 434 flow [2023-08-30 04:15:39,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:39,159 INFO L231 Difference]: Finished difference. Result has 114 places, 101 transitions, 310 flow [2023-08-30 04:15:39,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=310, PETRI_PLACES=114, PETRI_TRANSITIONS=101} [2023-08-30 04:15:39,160 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 15 predicate places. [2023-08-30 04:15:39,160 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 101 transitions, 310 flow [2023-08-30 04:15:39,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 237.3846153846154) internal successors, (3086), 13 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:39,162 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:39,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:39,367 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 [2023-08-30 04:15:39,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:39,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash -410340620, now seen corresponding path program 2 times [2023-08-30 04:15:39,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:39,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420119794] [2023-08-30 04:15:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420119794] [2023-08-30 04:15:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420119794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389018598] [2023-08-30 04:15:39,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:15:39,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:39,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:39,517 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) [2023-08-30 04:15:39,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:15:39,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:15:39,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:15:39,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:15:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:39,640 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 [2023-08-30 04:15:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:39,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:15:39,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389018598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:39,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:15:39,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 04:15:39,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481304937] [2023-08-30 04:15:39,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:39,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:15:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:15:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:39,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 543 [2023-08-30 04:15:39,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 101 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:39,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:39,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 543 [2023-08-30 04:15:39,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:40,099 INFO L130 PetriNetUnfolder]: 1030/2189 cut-off events. [2023-08-30 04:15:40,100 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:15:40,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4215 conditions, 2189 events. 1030/2189 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15449 event pairs, 574 based on Foata normal form. 0/1441 useless extension candidates. Maximal degree in co-relation 4138. Up to 1789 conditions per place. [2023-08-30 04:15:40,114 INFO L137 encePairwiseOnDemand]: 538/543 looper letters, 121 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2023-08-30 04:15:40,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 642 flow [2023-08-30 04:15:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:15:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:15:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1056 transitions. [2023-08-30 04:15:40,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861878453038674 [2023-08-30 04:15:40,119 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1056 transitions. [2023-08-30 04:15:40,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1056 transitions. [2023-08-30 04:15:40,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:40,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1056 transitions. [2023-08-30 04:15:40,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:40,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 543.0) internal successors, (2715), 5 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:40,127 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 543.0) internal successors, (2715), 5 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:40,127 INFO L175 Difference]: Start difference. First operand has 114 places, 101 transitions, 310 flow. Second operand 4 states and 1056 transitions. [2023-08-30 04:15:40,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 642 flow [2023-08-30 04:15:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 594 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:15:40,132 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 266 flow [2023-08-30 04:15:40,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2023-08-30 04:15:40,133 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 12 predicate places. [2023-08-30 04:15:40,133 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 266 flow [2023-08-30 04:15:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:40,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 04:15:40,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:40,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:40,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:40,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 164343463, now seen corresponding path program 1 times [2023-08-30 04:15:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645078189] [2023-08-30 04:15:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:40,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:15:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:40,401 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:15:40,401 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:15:40,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:15:40,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-08-30 04:15:40,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:15:40,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:15:40,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:15:40,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-08-30 04:15:40,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:15:40,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (42 of 50 remaining) [2023-08-30 04:15:40,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:15:40,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:15:40,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:15:40,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:15:40,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:15:40,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:15:40,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:15:40,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:15:40,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2023-08-30 04:15:40,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:15:40,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-08-30 04:15:40,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:15:40,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:15:40,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:15:40,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (27 of 50 remaining) [2023-08-30 04:15:40,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:15:40,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:15:40,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:15:40,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:15:40,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:15:40,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:15:40,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:15:40,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:15:40,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:15:40,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:15:40,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:15:40,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:15:40,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:15:40,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:15:40,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:15:40,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:15:40,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:15:40,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:15:40,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:15:40,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:15:40,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:15:40,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:15:40,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:15:40,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:15:40,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:15:40,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:15:40,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:15:40,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:15:40,412 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-30 04:15:40,414 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:15:40,415 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:15:40,448 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:15:40,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 365 transitions, 748 flow [2023-08-30 04:15:40,547 INFO L130 PetriNetUnfolder]: 118/718 cut-off events. [2023-08-30 04:15:40,547 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:15:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 718 events. 118/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4112 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 448. Up to 12 conditions per place. [2023-08-30 04:15:40,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 310 places, 365 transitions, 748 flow [2023-08-30 04:15:40,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 310 places, 365 transitions, 748 flow [2023-08-30 04:15:40,571 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:15:40,571 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 310 places, 365 transitions, 748 flow [2023-08-30 04:15:40,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 310 places, 365 transitions, 748 flow [2023-08-30 04:15:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 365 transitions, 748 flow [2023-08-30 04:15:40,644 INFO L130 PetriNetUnfolder]: 118/718 cut-off events. [2023-08-30 04:15:40,644 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:15:40,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 718 events. 118/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4112 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 448. Up to 12 conditions per place. [2023-08-30 04:15:40,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 67308 [2023-08-30 04:15:45,343 INFO L134 LiptonReduction]: Checked pairs total: 141516 [2023-08-30 04:15:45,343 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-30 04:15:45,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:15:45,345 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;@4a212105, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:15:45,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:15:45,347 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:15:45,347 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:15:45,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:45,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:15:45,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:45,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1875791, now seen corresponding path program 1 times [2023-08-30 04:15:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:45,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926282153] [2023-08-30 04:15:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:45,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926282153] [2023-08-30 04:15:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926282153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:45,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157395502] [2023-08-30 04:15:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:45,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 693 [2023-08-30 04:15:45,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 179 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:45,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:45,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 693 [2023-08-30 04:15:45,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:51,260 INFO L130 PetriNetUnfolder]: 50358/80318 cut-off events. [2023-08-30 04:15:51,260 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-30 04:15:51,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152658 conditions, 80318 events. 50358/80318 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 3094. Compared 699926 event pairs, 44992 based on Foata normal form. 6364/59622 useless extension candidates. Maximal degree in co-relation 61755. Up to 72201 conditions per place. [2023-08-30 04:15:51,865 INFO L137 encePairwiseOnDemand]: 636/693 looper letters, 99 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 04:15:51,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 472 flow [2023-08-30 04:15:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2023-08-30 04:15:51,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122655122655123 [2023-08-30 04:15:51,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2023-08-30 04:15:51,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2023-08-30 04:15:51,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:51,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2023-08-30 04:15:51,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:51,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:51,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:51,879 INFO L175 Difference]: Start difference. First operand has 132 places, 179 transitions, 376 flow. Second operand 3 states and 1065 transitions. [2023-08-30 04:15:51,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 472 flow [2023-08-30 04:15:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:15:51,883 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 280 flow [2023-08-30 04:15:51,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2023-08-30 04:15:51,884 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -9 predicate places. [2023-08-30 04:15:51,885 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 280 flow [2023-08-30 04:15:51,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:51,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:51,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:15:51,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:15:51,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:51,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 58192314, now seen corresponding path program 1 times [2023-08-30 04:15:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:51,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361298705] [2023-08-30 04:15:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361298705] [2023-08-30 04:15:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361298705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171728852] [2023-08-30 04:15:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:51,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:51,920 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) [2023-08-30 04:15:51,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 04:15:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:15:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:52,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171728852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:52,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:52,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 04:15:52,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446823875] [2023-08-30 04:15:52,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:52,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:15:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:15:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:52,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 693 [2023-08-30 04:15:52,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 303.1666666666667) internal successors, (1819), 6 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:52,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:52,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 693 [2023-08-30 04:15:52,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:57,003 INFO L130 PetriNetUnfolder]: 50358/80321 cut-off events. [2023-08-30 04:15:57,003 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-08-30 04:15:57,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152674 conditions, 80321 events. 50358/80321 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 3081. Compared 699610 event pairs, 44992 based on Foata normal form. 0/53261 useless extension candidates. Maximal degree in co-relation 152661. Up to 72201 conditions per place. [2023-08-30 04:15:57,519 INFO L137 encePairwiseOnDemand]: 690/693 looper letters, 99 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-30 04:15:57,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 500 flow [2023-08-30 04:15:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:15:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:15:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1919 transitions. [2023-08-30 04:15:57,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615199615199615 [2023-08-30 04:15:57,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1919 transitions. [2023-08-30 04:15:57,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1919 transitions. [2023-08-30 04:15:57,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:57,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1919 transitions. [2023-08-30 04:15:57,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 319.8333333333333) internal successors, (1919), 6 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,550 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 280 flow. Second operand 6 states and 1919 transitions. [2023-08-30 04:15:57,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 500 flow [2023-08-30 04:15:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 496 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:57,554 INFO L231 Difference]: Finished difference. Result has 130 places, 129 transitions, 312 flow [2023-08-30 04:15:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2023-08-30 04:15:57,555 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -2 predicate places. [2023-08-30 04:15:57,556 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 312 flow [2023-08-30 04:15:57,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 303.1666666666667) internal successors, (1819), 6 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:57,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:57,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:57,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:57,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:57,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:57,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1517098544, now seen corresponding path program 2 times [2023-08-30 04:15:57,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:57,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284718166] [2023-08-30 04:15:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:57,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:15:57,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:57,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284718166] [2023-08-30 04:15:57,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284718166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:57,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:57,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:57,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75328823] [2023-08-30 04:15:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:57,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:57,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 693 [2023-08-30 04:15:57,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:57,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 693 [2023-08-30 04:15:57,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:02,522 INFO L130 PetriNetUnfolder]: 48188/76652 cut-off events. [2023-08-30 04:16:02,522 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 04:16:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145984 conditions, 76652 events. 48188/76652 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 2973. Compared 664871 event pairs, 41156 based on Foata normal form. 0/51330 useless extension candidates. Maximal degree in co-relation 145949. Up to 66088 conditions per place. [2023-08-30 04:16:02,978 INFO L137 encePairwiseOnDemand]: 688/693 looper letters, 143 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2023-08-30 04:16:02,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 688 flow [2023-08-30 04:16:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:16:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:16:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2023-08-30 04:16:02,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007215007215007 [2023-08-30 04:16:02,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2023-08-30 04:16:02,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2023-08-30 04:16:02,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:02,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2023-08-30 04:16:02,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:02,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:02,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:02,991 INFO L175 Difference]: Start difference. First operand has 130 places, 129 transitions, 312 flow. Second operand 3 states and 1041 transitions. [2023-08-30 04:16:02,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 688 flow [2023-08-30 04:16:02,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 674 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:16:02,995 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 300 flow [2023-08-30 04:16:02,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-08-30 04:16:02,997 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -3 predicate places. [2023-08-30 04:16:02,997 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 300 flow [2023-08-30 04:16:02,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:02,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:02,998 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:16:02,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:16:02,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:02,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1517098545, now seen corresponding path program 1 times [2023-08-30 04:16:02,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:02,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743666019] [2023-08-30 04:16:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:02,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743666019] [2023-08-30 04:16:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743666019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:16:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616461370] [2023-08-30 04:16:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:03,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:03,066 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) [2023-08-30 04:16:03,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 04:16:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:16:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:16:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:16:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616461370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:16:03,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:16:03,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 04:16:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006873748] [2023-08-30 04:16:03,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:16:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:16:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:16:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:16:03,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 693 [2023-08-30 04:16:03,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 300 flow. Second operand has 12 states, 12 states have (on average 303.0833333333333) internal successors, (3637), 12 states have internal predecessors, (3637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:03,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:03,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 693 [2023-08-30 04:16:03,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:08,236 INFO L130 PetriNetUnfolder]: 48274/76974 cut-off events. [2023-08-30 04:16:08,236 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2023-08-30 04:16:08,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147375 conditions, 76974 events. 48274/76974 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 2971. Compared 668151 event pairs, 43084 based on Foata normal form. 6/52207 useless extension candidates. Maximal degree in co-relation 147322. Up to 69167 conditions per place. [2023-08-30 04:16:08,676 INFO L137 encePairwiseOnDemand]: 690/693 looper letters, 97 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2023-08-30 04:16:08,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 552 flow [2023-08-30 04:16:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:16:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:16:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3738 transitions. [2023-08-30 04:16:08,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2023-08-30 04:16:08,685 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3738 transitions. [2023-08-30 04:16:08,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3738 transitions. [2023-08-30 04:16:08,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:08,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3738 transitions. [2023-08-30 04:16:08,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 311.5) internal successors, (3738), 12 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:08,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 693.0) internal successors, (9009), 13 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:08,705 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 693.0) internal successors, (9009), 13 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:08,706 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 300 flow. Second operand 12 states and 3738 transitions. [2023-08-30 04:16:08,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 552 flow [2023-08-30 04:16:08,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 546 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:16:08,728 INFO L231 Difference]: Finished difference. Result has 144 places, 133 transitions, 378 flow [2023-08-30 04:16:08,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=144, PETRI_TRANSITIONS=133} [2023-08-30 04:16:08,729 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 12 predicate places. [2023-08-30 04:16:08,729 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 133 transitions, 378 flow [2023-08-30 04:16:08,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 303.0833333333333) internal successors, (3637), 12 states have internal predecessors, (3637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:08,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:08,730 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 04:16:08,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:16:08,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:08,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:08,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1043791473, now seen corresponding path program 2 times [2023-08-30 04:16:08,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:08,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101829439] [2023-08-30 04:16:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:09,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101829439] [2023-08-30 04:16:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101829439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:09,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:09,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:16:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345972059] [2023-08-30 04:16:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:09,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:09,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:16:09,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 693 [2023-08-30 04:16:09,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 133 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:09,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:09,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 693 [2023-08-30 04:16:09,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:14,197 INFO L130 PetriNetUnfolder]: 47677/76688 cut-off events. [2023-08-30 04:16:14,198 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-08-30 04:16:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146050 conditions, 76688 events. 47677/76688 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 3027. Compared 678654 event pairs, 20820 based on Foata normal form. 0/51476 useless extension candidates. Maximal degree in co-relation 145973. Up to 69111 conditions per place. [2023-08-30 04:16:14,714 INFO L137 encePairwiseOnDemand]: 689/693 looper letters, 131 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2023-08-30 04:16:14,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 158 transitions, 694 flow [2023-08-30 04:16:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:16:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:16:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-30 04:16:14,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959114959114959 [2023-08-30 04:16:14,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-30 04:16:14,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-30 04:16:14,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:14,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-30 04:16:14,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:14,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:14,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 693.0) internal successors, (2772), 4 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:14,723 INFO L175 Difference]: Start difference. First operand has 144 places, 133 transitions, 378 flow. Second operand 3 states and 1031 transitions. [2023-08-30 04:16:14,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 158 transitions, 694 flow [2023-08-30 04:16:14,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 646 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:16:14,727 INFO L231 Difference]: Finished difference. Result has 142 places, 134 transitions, 344 flow [2023-08-30 04:16:14,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=142, PETRI_TRANSITIONS=134} [2023-08-30 04:16:14,728 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 10 predicate places. [2023-08-30 04:16:14,729 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 134 transitions, 344 flow [2023-08-30 04:16:14,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:14,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:14,729 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:14,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:16:14,730 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:14,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:14,730 INFO L85 PathProgramCache]: Analyzing trace with hash -839170391, now seen corresponding path program 1 times [2023-08-30 04:16:14,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:14,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738693255] [2023-08-30 04:16:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:14,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738693255] [2023-08-30 04:16:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738693255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:16:14,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942411770] [2023-08-30 04:16:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:14,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:14,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:14,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:16:14,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 04:16:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:14,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:16:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:16:14,925 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 [2023-08-30 04:16:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:14,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:16:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:14,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942411770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:16:14,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:16:14,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 04:16:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396257604] [2023-08-30 04:16:14,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:16:14,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:16:14,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:16:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:16:15,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 693 [2023-08-30 04:16:15,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 134 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 300.125) internal successors, (2401), 8 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:15,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:15,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 693 [2023-08-30 04:16:15,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:15,761 INFO L130 PetriNetUnfolder]: 2531/4676 cut-off events. [2023-08-30 04:16:15,761 INFO L131 PetriNetUnfolder]: For 1108/1108 co-relation queries the response was YES. [2023-08-30 04:16:15,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 4676 events. 2531/4676 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 32955 event pairs, 242 based on Foata normal form. 506/4152 useless extension candidates. Maximal degree in co-relation 10246. Up to 2898 conditions per place. [2023-08-30 04:16:15,787 INFO L137 encePairwiseOnDemand]: 689/693 looper letters, 128 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-08-30 04:16:15,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 618 flow [2023-08-30 04:16:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:16:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:16:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1615 transitions. [2023-08-30 04:16:15,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660894660894661 [2023-08-30 04:16:15,791 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1615 transitions. [2023-08-30 04:16:15,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1615 transitions. [2023-08-30 04:16:15,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:15,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1615 transitions. [2023-08-30 04:16:15,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:15,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 693.0) internal successors, (4158), 6 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:15,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 693.0) internal successors, (4158), 6 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:15,799 INFO L175 Difference]: Start difference. First operand has 142 places, 134 transitions, 344 flow. Second operand 5 states and 1615 transitions. [2023-08-30 04:16:15,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 618 flow [2023-08-30 04:16:15,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 614 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:16:15,808 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 220 flow [2023-08-30 04:16:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2023-08-30 04:16:15,808 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -40 predicate places. [2023-08-30 04:16:15,809 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 220 flow [2023-08-30 04:16:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 300.125) internal successors, (2401), 8 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:15,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:16:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:16:16,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:16,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash -226624470, now seen corresponding path program 1 times [2023-08-30 04:16:16,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:16,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882874829] [2023-08-30 04:16:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:16,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:16,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882874829] [2023-08-30 04:16:16,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882874829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:16,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:16,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 04:16:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014432376] [2023-08-30 04:16:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:16,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:16:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:16:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:16:16,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 693 [2023-08-30 04:16:16,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 275.2857142857143) internal successors, (1927), 7 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:16,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:16,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 693 [2023-08-30 04:16:16,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:17,579 INFO L130 PetriNetUnfolder]: 4841/8261 cut-off events. [2023-08-30 04:16:17,579 INFO L131 PetriNetUnfolder]: For 3030/3030 co-relation queries the response was YES. [2023-08-30 04:16:17,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17825 conditions, 8261 events. 4841/8261 cut-off events. For 3030/3030 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 58311 event pairs, 2274 based on Foata normal form. 132/6476 useless extension candidates. Maximal degree in co-relation 17771. Up to 4005 conditions per place. [2023-08-30 04:16:17,632 INFO L137 encePairwiseOnDemand]: 684/693 looper letters, 151 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2023-08-30 04:16:17,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 171 transitions, 763 flow [2023-08-30 04:16:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:16:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:16:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2065 transitions. [2023-08-30 04:16:17,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42568542568542567 [2023-08-30 04:16:17,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2065 transitions. [2023-08-30 04:16:17,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2065 transitions. [2023-08-30 04:16:17,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:17,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2065 transitions. [2023-08-30 04:16:17,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:17,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:17,648 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:17,648 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 220 flow. Second operand 7 states and 2065 transitions. [2023-08-30 04:16:17,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 171 transitions, 763 flow [2023-08-30 04:16:17,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 171 transitions, 744 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 04:16:17,652 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 247 flow [2023-08-30 04:16:17,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-08-30 04:16:17,653 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -35 predicate places. [2023-08-30 04:16:17,653 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 247 flow [2023-08-30 04:16:17,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 275.2857142857143) internal successors, (1927), 7 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:17,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:17,654 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:17,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:16:17,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:17,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1564572533, now seen corresponding path program 1 times [2023-08-30 04:16:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:17,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931048328] [2023-08-30 04:16:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:17,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:17,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931048328] [2023-08-30 04:16:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931048328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:17,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:17,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:16:17,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655582009] [2023-08-30 04:16:17,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:17,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:16:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:16:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:16:18,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 693 [2023-08-30 04:16:18,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 278.6666666666667) internal successors, (1672), 6 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:18,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:18,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 693 [2023-08-30 04:16:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:18,648 INFO L130 PetriNetUnfolder]: 3920/6680 cut-off events. [2023-08-30 04:16:18,649 INFO L131 PetriNetUnfolder]: For 1380/1380 co-relation queries the response was YES. [2023-08-30 04:16:18,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14566 conditions, 6680 events. 3920/6680 cut-off events. For 1380/1380 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46069 event pairs, 145 based on Foata normal form. 0/5674 useless extension candidates. Maximal degree in co-relation 14510. Up to 5808 conditions per place. [2023-08-30 04:16:18,683 INFO L137 encePairwiseOnDemand]: 686/693 looper letters, 84 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 04:16:18,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 468 flow [2023-08-30 04:16:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:16:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:16:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2023-08-30 04:16:18,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274891774891775 [2023-08-30 04:16:18,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2023-08-30 04:16:18,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2023-08-30 04:16:18,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:18,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2023-08-30 04:16:18,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:18,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 693.0) internal successors, (3465), 5 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:18,693 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 693.0) internal successors, (3465), 5 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:18,693 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 247 flow. Second operand 4 states and 1185 transitions. [2023-08-30 04:16:18,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 468 flow [2023-08-30 04:16:18,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:16:18,697 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 238 flow [2023-08-30 04:16:18,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-08-30 04:16:18,698 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -39 predicate places. [2023-08-30 04:16:18,698 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 238 flow [2023-08-30 04:16:18,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 278.6666666666667) internal successors, (1672), 6 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:18,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:18,699 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:18,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:16:18,699 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:18,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:18,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1564572977, now seen corresponding path program 1 times [2023-08-30 04:16:18,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:18,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479636425] [2023-08-30 04:16:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:18,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:16:18,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:18,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479636425] [2023-08-30 04:16:18,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479636425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:18,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:18,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:16:18,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085087991] [2023-08-30 04:16:18,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:18,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:16:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:16:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:16:19,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 693 [2023-08-30 04:16:19,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:19,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:19,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 693 [2023-08-30 04:16:19,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:16:20,262 INFO L130 PetriNetUnfolder]: 8039/13737 cut-off events. [2023-08-30 04:16:20,262 INFO L131 PetriNetUnfolder]: For 3394/3394 co-relation queries the response was YES. [2023-08-30 04:16:20,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 13737 events. 8039/13737 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 103528 event pairs, 1314 based on Foata normal form. 0/11466 useless extension candidates. Maximal degree in co-relation 30401. Up to 6304 conditions per place. [2023-08-30 04:16:20,351 INFO L137 encePairwiseOnDemand]: 684/693 looper letters, 144 selfloop transitions, 17 changer transitions 0/174 dead transitions. [2023-08-30 04:16:20,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 174 transitions, 837 flow [2023-08-30 04:16:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:16:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:16:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1836 transitions. [2023-08-30 04:16:20,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-30 04:16:20,356 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1836 transitions. [2023-08-30 04:16:20,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1836 transitions. [2023-08-30 04:16:20,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:16:20,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1836 transitions. [2023-08-30 04:16:20,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:20,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:20,365 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 693.0) internal successors, (4851), 7 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:20,365 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 238 flow. Second operand 6 states and 1836 transitions. [2023-08-30 04:16:20,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 174 transitions, 837 flow [2023-08-30 04:16:20,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 174 transitions, 833 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:16:20,375 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 357 flow [2023-08-30 04:16:20,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=693, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-30 04:16:20,375 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -33 predicate places. [2023-08-30 04:16:20,376 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 357 flow [2023-08-30 04:16:20,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:20,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:20,376 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:16:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:16:20,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:16:20,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1622505736, now seen corresponding path program 1 times [2023-08-30 04:16:20,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460825262] [2023-08-30 04:16:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:16:20,415 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:16:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:16:20,444 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:16:20,445 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:16:20,445 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (60 of 61 remaining) [2023-08-30 04:16:20,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (53 of 61 remaining) [2023-08-30 04:16:20,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 61 remaining) [2023-08-30 04:16:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 61 remaining) [2023-08-30 04:16:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 61 remaining) [2023-08-30 04:16:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 61 remaining) [2023-08-30 04:16:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 61 remaining) [2023-08-30 04:16:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 61 remaining) [2023-08-30 04:16:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 61 remaining) [2023-08-30 04:16:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 61 remaining) [2023-08-30 04:16:20,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (38 of 61 remaining) [2023-08-30 04:16:20,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 61 remaining) [2023-08-30 04:16:20,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 61 remaining) [2023-08-30 04:16:20,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 61 remaining) [2023-08-30 04:16:20,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 61 remaining) [2023-08-30 04:16:20,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 61 remaining) [2023-08-30 04:16:20,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 61 remaining) [2023-08-30 04:16:20,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 61 remaining) [2023-08-30 04:16:20,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 61 remaining) [2023-08-30 04:16:20,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 61 remaining) [2023-08-30 04:16:20,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 61 remaining) [2023-08-30 04:16:20,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 61 remaining) [2023-08-30 04:16:20,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 61 remaining) [2023-08-30 04:16:20,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 61 remaining) [2023-08-30 04:16:20,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 61 remaining) [2023-08-30 04:16:20,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 61 remaining) [2023-08-30 04:16:20,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 61 remaining) [2023-08-30 04:16:20,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 61 remaining) [2023-08-30 04:16:20,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 61 remaining) [2023-08-30 04:16:20,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 61 remaining) [2023-08-30 04:16:20,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 61 remaining) [2023-08-30 04:16:20,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 61 remaining) [2023-08-30 04:16:20,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 61 remaining) [2023-08-30 04:16:20,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 61 remaining) [2023-08-30 04:16:20,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 61 remaining) [2023-08-30 04:16:20,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 61 remaining) [2023-08-30 04:16:20,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 61 remaining) [2023-08-30 04:16:20,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:16:20,456 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:16:20,457 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:16:20,457 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:16:20,500 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:16:20,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 446 transitions, 922 flow [2023-08-30 04:16:20,629 INFO L130 PetriNetUnfolder]: 168/1031 cut-off events. [2023-08-30 04:16:20,630 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:16:20,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 1031 events. 168/1031 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6243 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 726. Up to 16 conditions per place. [2023-08-30 04:16:20,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 446 transitions, 922 flow [2023-08-30 04:16:20,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 446 transitions, 922 flow [2023-08-30 04:16:20,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:16:20,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 446 transitions, 922 flow [2023-08-30 04:16:20,658 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 446 transitions, 922 flow [2023-08-30 04:16:20,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 446 transitions, 922 flow [2023-08-30 04:16:20,763 INFO L130 PetriNetUnfolder]: 168/1031 cut-off events. [2023-08-30 04:16:20,764 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:16:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 1031 events. 168/1031 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6243 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 726. Up to 16 conditions per place. [2023-08-30 04:16:20,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 120396 [2023-08-30 04:16:25,835 INFO L134 LiptonReduction]: Checked pairs total: 258592 [2023-08-30 04:16:25,835 INFO L136 LiptonReduction]: Total number of compositions: 392 [2023-08-30 04:16:25,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:16:25,837 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;@4a212105, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:16:25,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-08-30 04:16:25,838 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:16:25,838 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:16:25,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:25,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:16:25,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-30 04:16:25,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2785935, now seen corresponding path program 1 times [2023-08-30 04:16:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:25,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343338495] [2023-08-30 04:16:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:25,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:25,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343338495] [2023-08-30 04:16:25,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343338495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:25,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:25,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:16:25,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503195011] [2023-08-30 04:16:25,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:25,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:25,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:25,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:16:25,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 838 [2023-08-30 04:16:25,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:25,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:25,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 838 [2023-08-30 04:16:25,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand