./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.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_06-cond_racing1.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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --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 04:03:09,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:03:09,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:03:09,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:03:09,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:03:09,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:03:09,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:03:09,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:03:09,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:03:09,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:03:09,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:03:09,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:03:09,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:03:09,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:03:09,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:03:09,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:03:09,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:03:09,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:03:09,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:03:09,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:03:09,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:03:09,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:03:09,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:03:09,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:03:09,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:03:09,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:03:09,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:03:09,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:03:09,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:03:09,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:03:09,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:03:09,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:03:09,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:03:09,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:03:09,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:03:09,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:03:09,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:03:09,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:03:09,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:03:09,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:03:09,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:03:09,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:03:09,113 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:03:09,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:03:09,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:03:09,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:03:09,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:03:09,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:03:09,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:03:09,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:03:09,115 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:03:09,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:03:09,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:03:09,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:03:09,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:03:09,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:03:09,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:03:09,118 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:03:09,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:03:09,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:03:09,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:03:09,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:03:09,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:03:09,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:03:09,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:03:09,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:03:09,119 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:03:09,119 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:03:09,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:03:09,120 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:03:09,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:03:09,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:03:09,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:03:09,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:03:09,337 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:03:09,337 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:03:09,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-30 04:03:10,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:03:10,619 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:03:10,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-30 04:03:10,630 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a51b8afd3/5c8c520e66174503831ce9e4e23b1e98/FLAG8eb2f9582 [2023-08-30 04:03:10,654 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a51b8afd3/5c8c520e66174503831ce9e4e23b1e98 [2023-08-30 04:03:10,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:03:10,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:03:10,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:03:10,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:03:10,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:03:10,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:03:10" (1/1) ... [2023-08-30 04:03:10,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa53554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:10, skipping insertion in model container [2023-08-30 04:03:10,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:03:10" (1/1) ... [2023-08-30 04:03:10,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:03:10,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:03:10,953 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_06-cond_racing1.i[41322,41335] [2023-08-30 04:03:10,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:03:10,981 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:03:11,009 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_06-cond_racing1.i[41322,41335] [2023-08-30 04:03:11,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:03:11,077 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:03:11,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11 WrapperNode [2023-08-30 04:03:11,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:03:11,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:03:11,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:03:11,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:03:11,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,129 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-08-30 04:03:11,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:03:11,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:03:11,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:03:11,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:03:11,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,163 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:03:11,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:03:11,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:03:11,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:03:11,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (1/1) ... [2023-08-30 04:03:11,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:03:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:03:11,192 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 04:03:11,211 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 04:03:11,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:03:11,223 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:03:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:03:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:03:11,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:03:11,225 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 04:03:11,336 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:03:11,337 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:03:11,510 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:03:11,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:03:11,515 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 04:03:11,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:03:11 BoogieIcfgContainer [2023-08-30 04:03:11,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:03:11,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:03:11,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:03:11,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:03:11,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:03:10" (1/3) ... [2023-08-30 04:03:11,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33af0ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:03:11, skipping insertion in model container [2023-08-30 04:03:11,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:11" (2/3) ... [2023-08-30 04:03:11,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33af0ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:03:11, skipping insertion in model container [2023-08-30 04:03:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:03:11" (3/3) ... [2023-08-30 04:03:11,521 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-08-30 04:03:11,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:03:11,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:03:11,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:03:11,571 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:03:11,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2023-08-30 04:03:11,644 INFO L130 PetriNetUnfolder]: 23/176 cut-off events. [2023-08-30 04:03:11,645 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:03:11,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 176 events. 23/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-30 04:03:11,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 127 transitions, 262 flow [2023-08-30 04:03:11,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 127 transitions, 262 flow [2023-08-30 04:03:11,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:03:11,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 127 transitions, 262 flow [2023-08-30 04:03:11,671 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 127 transitions, 262 flow [2023-08-30 04:03:11,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2023-08-30 04:03:11,694 INFO L130 PetriNetUnfolder]: 23/176 cut-off events. [2023-08-30 04:03:11,694 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:03:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 176 events. 23/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-30 04:03:11,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-30 04:03:14,669 INFO L134 LiptonReduction]: Checked pairs total: 5656 [2023-08-30 04:03:14,669 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-30 04:03:14,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:03:14,683 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;@6e7ff301, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:03:14,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:03:14,685 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:03:14,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:03:14,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:14,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:14,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:14,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash 15738, now seen corresponding path program 1 times [2023-08-30 04:03:14,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:14,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60581600] [2023-08-30 04:03:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:14,884 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 04:03:14,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:14,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60581600] [2023-08-30 04:03:14,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60581600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:14,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:14,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:14,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816337148] [2023-08-30 04:03:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:14,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:14,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 242 [2023-08-30 04:03:14,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 04:03:14,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:14,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 242 [2023-08-30 04:03:14,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:15,019 INFO L130 PetriNetUnfolder]: 123/282 cut-off events. [2023-08-30 04:03:15,020 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:03:15,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 282 events. 123/282 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1132 event pairs, 96 based on Foata normal form. 15/222 useless extension candidates. Maximal degree in co-relation 518. Up to 237 conditions per place. [2023-08-30 04:03:15,022 INFO L137 encePairwiseOnDemand]: 229/242 looper letters, 32 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2023-08-30 04:03:15,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 152 flow [2023-08-30 04:03:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-30 04:03:15,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041322314049587 [2023-08-30 04:03:15,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-30 04:03:15,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-30 04:03:15,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:15,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-30 04:03:15,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 04:03:15,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 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 04:03:15,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 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 04:03:15,052 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 366 transitions. [2023-08-30 04:03:15,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 152 flow [2023-08-30 04:03:15,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:03:15,056 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 68 flow [2023-08-30 04:03:15,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-30 04:03:15,060 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 04:03:15,060 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 68 flow [2023-08-30 04:03:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 04:03:15,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:15,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:03:15,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:15,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 15740, now seen corresponding path program 1 times [2023-08-30 04:03:15,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963849246] [2023-08-30 04:03:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:15,165 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 04:03:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:15,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963849246] [2023-08-30 04:03:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963849246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:15,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:15,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363314300] [2023-08-30 04:03:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:15,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:15,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:15,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-08-30 04:03:15,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 04:03:15,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:15,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-08-30 04:03:15,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:15,255 INFO L130 PetriNetUnfolder]: 113/256 cut-off events. [2023-08-30 04:03:15,255 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:03:15,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 256 events. 113/256 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1189 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 486. Up to 236 conditions per place. [2023-08-30 04:03:15,257 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 33 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 04:03:15,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 156 flow [2023-08-30 04:03:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-30 04:03:15,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986225895316804 [2023-08-30 04:03:15,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-30 04:03:15,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-30 04:03:15,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:15,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-30 04:03:15,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 04:03:15,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 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 04:03:15,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 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 04:03:15,263 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 68 flow. Second operand 3 states and 362 transitions. [2023-08-30 04:03:15,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 156 flow [2023-08-30 04:03:15,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:03:15,265 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-08-30 04:03:15,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-30 04:03:15,266 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 04:03:15,266 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-08-30 04:03:15,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 04:03:15,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:15,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:03:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:03:15,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:15,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash 469228299, now seen corresponding path program 1 times [2023-08-30 04:03:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447151892] [2023-08-30 04:03:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:15,342 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 04:03:15,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:15,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447151892] [2023-08-30 04:03:15,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447151892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:03:15,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588450821] [2023-08-30 04:03:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:15,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:03:15,346 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 04:03:15,374 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 04:03:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:03:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:03:15,470 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 04:03:15,511 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 04:03:15,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:03:15,558 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 04:03:15,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588450821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:03:15,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:03:15,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:03:15,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495714807] [2023-08-30 04:03:15,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:03:15,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:03:15,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:15,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:03:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:03:15,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 242 [2023-08-30 04:03:15,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 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 04:03:15,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:15,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 242 [2023-08-30 04:03:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:15,701 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2023-08-30 04:03:15,701 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:03:15,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 16/48 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-30 04:03:15,702 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 04:03:15,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2023-08-30 04:03:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:03:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:03:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-30 04:03:15,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 04:03:15,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-30 04:03:15,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-30 04:03:15,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:15,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-30 04:03:15,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 04:03:15,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 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 04:03:15,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 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 04:03:15,707 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 4 states and 440 transitions. [2023-08-30 04:03:15,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2023-08-30 04:03:15,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:03:15,708 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2023-08-30 04:03:15,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-30 04:03:15,709 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -12 predicate places. [2023-08-30 04:03:15,709 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2023-08-30 04:03:15,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 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 04:03:15,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:15,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:03:15,719 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 04:03:15,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:15,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:15,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:15,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1661175696, now seen corresponding path program 1 times [2023-08-30 04:03:15,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:15,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967535846] [2023-08-30 04:03:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:15,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:15,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:03:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:15,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:03:15,959 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:03:15,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:03:15,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:03:15,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:03:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:03:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:03:15,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:03:15,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:03:15,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:03:15,965 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:03:15,967 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:03:15,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:03:15,990 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:03:15,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2023-08-30 04:03:16,008 INFO L130 PetriNetUnfolder]: 40/284 cut-off events. [2023-08-30 04:03:16,009 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:03:16,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 40/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 870 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2023-08-30 04:03:16,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 157 transitions, 332 flow [2023-08-30 04:03:16,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 157 transitions, 332 flow [2023-08-30 04:03:16,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:03:16,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 157 transitions, 332 flow [2023-08-30 04:03:16,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 157 transitions, 332 flow [2023-08-30 04:03:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2023-08-30 04:03:16,028 INFO L130 PetriNetUnfolder]: 40/284 cut-off events. [2023-08-30 04:03:16,028 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:03:16,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 40/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 870 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2023-08-30 04:03:16,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-30 04:03:18,738 INFO L134 LiptonReduction]: Checked pairs total: 19383 [2023-08-30 04:03:18,739 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-30 04:03:18,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:03:18,741 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;@6e7ff301, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:03:18,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:03:18,742 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:03:18,742 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:03:18,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:18,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:18,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:18,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:18,743 INFO L85 PathProgramCache]: Analyzing trace with hash 25659, now seen corresponding path program 1 times [2023-08-30 04:03:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:18,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643128865] [2023-08-30 04:03:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:18,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:18,800 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 04:03:18,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:18,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643128865] [2023-08-30 04:03:18,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643128865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:18,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:18,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634117211] [2023-08-30 04:03:18,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:18,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 280 [2023-08-30 04:03:18,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 04:03:18,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:18,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 280 [2023-08-30 04:03:18,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:19,101 INFO L130 PetriNetUnfolder]: 2166/3859 cut-off events. [2023-08-30 04:03:19,101 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 04:03:19,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 3859 events. 2166/3859 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 24886 event pairs, 1724 based on Foata normal form. 485/3532 useless extension candidates. Maximal degree in co-relation 3857. Up to 3497 conditions per place. [2023-08-30 04:03:19,114 INFO L137 encePairwiseOnDemand]: 260/280 looper letters, 43 selfloop transitions, 2 changer transitions 2/58 dead transitions. [2023-08-30 04:03:19,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 228 flow [2023-08-30 04:03:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 04:03:19,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488095238095239 [2023-08-30 04:03:19,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 04:03:19,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 04:03:19,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:19,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 04:03:19,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 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 04:03:19,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 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 04:03:19,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 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 04:03:19,119 INFO L175 Difference]: Start difference. First operand has 51 places, 64 transitions, 146 flow. Second operand 3 states and 461 transitions. [2023-08-30 04:03:19,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 228 flow [2023-08-30 04:03:19,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:03:19,120 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 128 flow [2023-08-30 04:03:19,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 04:03:19,121 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-30 04:03:19,121 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 128 flow [2023-08-30 04:03:19,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 04:03:19,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:19,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:03:19,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:19,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash 25658, now seen corresponding path program 1 times [2023-08-30 04:03:19,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649963508] [2023-08-30 04:03:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:19,142 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 04:03:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649963508] [2023-08-30 04:03:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649963508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619795974] [2023-08-30 04:03:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:19,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 280 [2023-08-30 04:03:19,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 04:03:19,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:19,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 280 [2023-08-30 04:03:19,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:19,402 INFO L130 PetriNetUnfolder]: 1686/3006 cut-off events. [2023-08-30 04:03:19,402 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-08-30 04:03:19,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6074 conditions, 3006 events. 1686/3006 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18439 event pairs, 1484 based on Foata normal form. 0/2569 useless extension candidates. Maximal degree in co-relation 6013. Up to 2521 conditions per place. [2023-08-30 04:03:19,414 INFO L137 encePairwiseOnDemand]: 276/280 looper letters, 47 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-30 04:03:19,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 250 flow [2023-08-30 04:03:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-30 04:03:19,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513095238095238 [2023-08-30 04:03:19,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-30 04:03:19,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-30 04:03:19,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:19,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-30 04:03:19,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 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 04:03:19,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 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 04:03:19,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 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 04:03:19,419 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 128 flow. Second operand 3 states and 431 transitions. [2023-08-30 04:03:19,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 250 flow [2023-08-30 04:03:19,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:03:19,421 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 126 flow [2023-08-30 04:03:19,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 04:03:19,422 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-30 04:03:19,422 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 126 flow [2023-08-30 04:03:19,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 04:03:19,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:19,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:03:19,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:03:19,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:19,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2055218131, now seen corresponding path program 1 times [2023-08-30 04:03:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:19,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696332530] [2023-08-30 04:03:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:19,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:19,473 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 04:03:19,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696332530] [2023-08-30 04:03:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696332530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:03:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252374689] [2023-08-30 04:03:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:19,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:03:19,475 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 04:03:19,477 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 04:03:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:03:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:03:19,537 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 04:03:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:19,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:03:19,600 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 04:03:19,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252374689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:03:19,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:03:19,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:03:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307832700] [2023-08-30 04:03:19,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:03:19,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:03:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:03:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:03:19,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 280 [2023-08-30 04:03:19,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 128.875) internal successors, (1031), 8 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 04:03:19,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:19,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 280 [2023-08-30 04:03:19,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:19,888 INFO L130 PetriNetUnfolder]: 1520/2561 cut-off events. [2023-08-30 04:03:19,888 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2023-08-30 04:03:19,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 2561 events. 1520/2561 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15792 event pairs, 41 based on Foata normal form. 7/2360 useless extension candidates. Maximal degree in co-relation 4961. Up to 2091 conditions per place. [2023-08-30 04:03:19,899 INFO L137 encePairwiseOnDemand]: 274/280 looper letters, 66 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-30 04:03:19,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 334 flow [2023-08-30 04:03:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:03:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:03:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-08-30 04:03:19,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064285714285715 [2023-08-30 04:03:19,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-08-30 04:03:19,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-08-30 04:03:19,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:19,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-08-30 04:03:19,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 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 04:03:19,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 0 states have call successors, (0), 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 04:03:19,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 280.0) internal successors, (1680), 6 states have internal predecessors, (1680), 0 states have call successors, (0), 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 04:03:19,905 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 126 flow. Second operand 5 states and 709 transitions. [2023-08-30 04:03:19,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 334 flow [2023-08-30 04:03:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:03:19,909 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 132 flow [2023-08-30 04:03:19,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-30 04:03:19,910 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-30 04:03:19,910 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 132 flow [2023-08-30 04:03:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.875) internal successors, (1031), 8 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 04:03:19,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:19,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:03:19,937 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 04:03:20,121 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,SelfDestructingSolverStorable6 [2023-08-30 04:03:20,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:20,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -367955318, now seen corresponding path program 1 times [2023-08-30 04:03:20,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:20,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638144502] [2023-08-30 04:03:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:20,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:03:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:20,139 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:03:20,139 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:03:20,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:03:20,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:03:20,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:03:20,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:03:20,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:03:20,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:03:20,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:03:20,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:03:20,140 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:03:20,141 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:03:20,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:03:20,158 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:03:20,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2023-08-30 04:03:20,181 INFO L130 PetriNetUnfolder]: 62/433 cut-off events. [2023-08-30 04:03:20,181 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:03:20,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 433 events. 62/433 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1507 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-08-30 04:03:20,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 187 transitions, 404 flow [2023-08-30 04:03:20,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 187 transitions, 404 flow [2023-08-30 04:03:20,185 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:03:20,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 187 transitions, 404 flow [2023-08-30 04:03:20,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 187 transitions, 404 flow [2023-08-30 04:03:20,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2023-08-30 04:03:20,207 INFO L130 PetriNetUnfolder]: 62/433 cut-off events. [2023-08-30 04:03:20,208 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:03:20,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 433 events. 62/433 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1507 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-08-30 04:03:20,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-30 04:03:23,007 INFO L134 LiptonReduction]: Checked pairs total: 40724 [2023-08-30 04:03:23,007 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-30 04:03:23,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:03:23,009 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;@6e7ff301, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:03:23,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:03:23,010 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:03:23,010 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:03:23,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:23,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:23,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:23,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 37120, now seen corresponding path program 1 times [2023-08-30 04:03:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:23,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943337668] [2023-08-30 04:03:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:23,050 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 04:03:23,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943337668] [2023-08-30 04:03:23,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943337668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:23,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:23,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:23,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524804659] [2023-08-30 04:03:23,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:23,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:23,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:23,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 328 [2023-08-30 04:03:23,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 04:03:23,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:23,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 328 [2023-08-30 04:03:23,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:25,556 INFO L130 PetriNetUnfolder]: 23226/35878 cut-off events. [2023-08-30 04:03:25,557 INFO L131 PetriNetUnfolder]: For 799/799 co-relation queries the response was YES. [2023-08-30 04:03:25,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69334 conditions, 35878 events. 23226/35878 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 273697 event pairs, 14833 based on Foata normal form. 8032/38131 useless extension candidates. Maximal degree in co-relation 7237. Up to 32880 conditions per place. [2023-08-30 04:03:25,723 INFO L137 encePairwiseOnDemand]: 303/328 looper letters, 51 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-30 04:03:25,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 278 flow [2023-08-30 04:03:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 04:03:25,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477642276422764 [2023-08-30 04:03:25,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 04:03:25,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 04:03:25,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:25,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 04:03:25,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 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 04:03:25,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 04:03:25,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 04:03:25,729 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 192 flow. Second operand 3 states and 539 transitions. [2023-08-30 04:03:25,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 278 flow [2023-08-30 04:03:25,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:03:25,734 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 166 flow [2023-08-30 04:03:25,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-30 04:03:25,735 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-30 04:03:25,735 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 166 flow [2023-08-30 04:03:25,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 04:03:25,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:25,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:25,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:03:25,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:25,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash 37119, now seen corresponding path program 1 times [2023-08-30 04:03:25,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:25,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726541613] [2023-08-30 04:03:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:25,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:25,756 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 04:03:25,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726541613] [2023-08-30 04:03:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726541613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354684549] [2023-08-30 04:03:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:25,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:25,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:25,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 328 [2023-08-30 04:03:25,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 04:03:25,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:25,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 328 [2023-08-30 04:03:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:27,398 INFO L130 PetriNetUnfolder]: 19018/28949 cut-off events. [2023-08-30 04:03:27,398 INFO L131 PetriNetUnfolder]: For 1716/1716 co-relation queries the response was YES. [2023-08-30 04:03:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58450 conditions, 28949 events. 19018/28949 cut-off events. For 1716/1716 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 211428 event pairs, 16947 based on Foata normal form. 0/25413 useless extension candidates. Maximal degree in co-relation 58388. Up to 24777 conditions per place. [2023-08-30 04:03:27,511 INFO L137 encePairwiseOnDemand]: 324/328 looper letters, 61 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 04:03:27,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 328 flow [2023-08-30 04:03:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 04:03:27,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193089430894309 [2023-08-30 04:03:27,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 04:03:27,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 04:03:27,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:27,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 04:03:27,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 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 04:03:27,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 04:03:27,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 04:03:27,516 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 166 flow. Second operand 3 states and 511 transitions. [2023-08-30 04:03:27,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 328 flow [2023-08-30 04:03:27,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:03:27,520 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 164 flow [2023-08-30 04:03:27,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-30 04:03:27,521 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-08-30 04:03:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 164 flow [2023-08-30 04:03:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 04:03:27,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:27,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:03:27,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:03:27,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:27,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash -50299782, now seen corresponding path program 1 times [2023-08-30 04:03:27,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882226882] [2023-08-30 04:03:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:27,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:27,590 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 04:03:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882226882] [2023-08-30 04:03:27,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882226882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:03:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180460536] [2023-08-30 04:03:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:03:27,592 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 04:03:27,597 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 04:03:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:03:27,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:03:27,662 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 04:03:27,688 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 04:03:27,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:03:27,722 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 04:03:27,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180460536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:03:27,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:03:27,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:03:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911662403] [2023-08-30 04:03:27,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:03:27,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:03:27,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:03:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:03:27,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 328 [2023-08-30 04:03:27,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 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 04:03:27,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:27,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 328 [2023-08-30 04:03:27,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:29,432 INFO L130 PetriNetUnfolder]: 18108/27207 cut-off events. [2023-08-30 04:03:29,432 INFO L131 PetriNetUnfolder]: For 2386/2386 co-relation queries the response was YES. [2023-08-30 04:03:29,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56285 conditions, 27207 events. 18108/27207 cut-off events. For 2386/2386 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 193808 event pairs, 4377 based on Foata normal form. 7/24765 useless extension candidates. Maximal degree in co-relation 51170. Up to 20037 conditions per place. [2023-08-30 04:03:29,530 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 114 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2023-08-30 04:03:29,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 136 transitions, 570 flow [2023-08-30 04:03:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:03:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:03:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1019 transitions. [2023-08-30 04:03:29,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177845528455285 [2023-08-30 04:03:29,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1019 transitions. [2023-08-30 04:03:29,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1019 transitions. [2023-08-30 04:03:29,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:29,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1019 transitions. [2023-08-30 04:03:29,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.83333333333334) internal successors, (1019), 6 states have internal predecessors, (1019), 0 states have call successors, (0), 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 04:03:29,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:29,537 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:29,538 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 164 flow. Second operand 6 states and 1019 transitions. [2023-08-30 04:03:29,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 136 transitions, 570 flow [2023-08-30 04:03:29,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 136 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:03:29,591 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 180 flow [2023-08-30 04:03:29,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-30 04:03:29,591 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2023-08-30 04:03:29,591 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 180 flow [2023-08-30 04:03:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 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 04:03:29,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:29,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:03:29,601 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 04:03:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:29,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:29,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1348795185, now seen corresponding path program 1 times [2023-08-30 04:03:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:29,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099641483] [2023-08-30 04:03:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:03:29,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099641483] [2023-08-30 04:03:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099641483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:29,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:03:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409775327] [2023-08-30 04:03:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:29,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:03:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:03:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:03:29,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 328 [2023-08-30 04:03:29,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 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 04:03:29,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:29,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 328 [2023-08-30 04:03:29,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:31,228 INFO L130 PetriNetUnfolder]: 15639/23497 cut-off events. [2023-08-30 04:03:31,228 INFO L131 PetriNetUnfolder]: For 3699/3699 co-relation queries the response was YES. [2023-08-30 04:03:31,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49664 conditions, 23497 events. 15639/23497 cut-off events. For 3699/3699 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 163716 event pairs, 11935 based on Foata normal form. 504/22224 useless extension candidates. Maximal degree in co-relation 9624. Up to 17192 conditions per place. [2023-08-30 04:03:31,310 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 83 selfloop transitions, 6 changer transitions 0/105 dead transitions. [2023-08-30 04:03:31,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 457 flow [2023-08-30 04:03:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:03:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:03:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-30 04:03:31,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2023-08-30 04:03:31,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-30 04:03:31,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-30 04:03:31,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:31,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-30 04:03:31,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 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 04:03:31,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 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 04:03:31,316 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 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 04:03:31,316 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 180 flow. Second operand 4 states and 688 transitions. [2023-08-30 04:03:31,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 457 flow [2023-08-30 04:03:31,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 450 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 04:03:31,322 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 194 flow [2023-08-30 04:03:31,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-08-30 04:03:31,323 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2023-08-30 04:03:31,323 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 194 flow [2023-08-30 04:03:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 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 04:03:31,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:31,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:03:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:03:31,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:31,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1348794866, now seen corresponding path program 1 times [2023-08-30 04:03:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298884946] [2023-08-30 04:03:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:03:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298884946] [2023-08-30 04:03:31,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298884946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:31,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:31,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304311840] [2023-08-30 04:03:31,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:31,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:31,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 328 [2023-08-30 04:03:31,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 04:03:31,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:31,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 328 [2023-08-30 04:03:31,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:33,261 INFO L130 PetriNetUnfolder]: 25368/37553 cut-off events. [2023-08-30 04:03:33,261 INFO L131 PetriNetUnfolder]: For 10873/10873 co-relation queries the response was YES. [2023-08-30 04:03:33,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81595 conditions, 37553 events. 25368/37553 cut-off events. For 10873/10873 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 254370 event pairs, 10711 based on Foata normal form. 0/35886 useless extension candidates. Maximal degree in co-relation 57089. Up to 34656 conditions per place. [2023-08-30 04:03:33,412 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 68 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-30 04:03:33,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 421 flow [2023-08-30 04:03:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 04:03:33,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254065040650406 [2023-08-30 04:03:33,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 04:03:33,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 04:03:33,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:33,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 04:03:33,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 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 04:03:33,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 04:03:33,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 04:03:33,416 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 194 flow. Second operand 3 states and 517 transitions. [2023-08-30 04:03:33,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 421 flow [2023-08-30 04:03:33,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:03:33,448 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 217 flow [2023-08-30 04:03:33,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-08-30 04:03:33,448 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2023-08-30 04:03:33,448 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 217 flow [2023-08-30 04:03:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 04:03:33,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:33,449 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:03:33,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:03:33,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:33,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1553089263, now seen corresponding path program 1 times [2023-08-30 04:03:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:33,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078320841] [2023-08-30 04:03:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:33,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:03:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:33,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:03:33,467 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:03:33,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:03:33,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:03:33,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:03:33,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:03:33,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:03:33,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:03:33,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:03:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:03:33,468 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 04:03:33,469 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:03:33,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:03:33,491 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:03:33,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2023-08-30 04:03:33,655 INFO L130 PetriNetUnfolder]: 96/666 cut-off events. [2023-08-30 04:03:33,655 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:03:33,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 666 events. 96/666 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2721 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 453. Up to 32 conditions per place. [2023-08-30 04:03:33,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 478 flow [2023-08-30 04:03:33,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 478 flow [2023-08-30 04:03:33,663 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:03:33,663 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 217 transitions, 478 flow [2023-08-30 04:03:33,663 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 217 transitions, 478 flow [2023-08-30 04:03:33,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2023-08-30 04:03:33,701 INFO L130 PetriNetUnfolder]: 96/666 cut-off events. [2023-08-30 04:03:33,701 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:03:33,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 666 events. 96/666 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2721 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 453. Up to 32 conditions per place. [2023-08-30 04:03:33,718 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-30 04:03:36,753 INFO L134 LiptonReduction]: Checked pairs total: 68895 [2023-08-30 04:03:36,753 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-30 04:03:36,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:03:36,755 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;@6e7ff301, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:03:36,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:03:36,756 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:03:36,756 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:03:36,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:36,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:36,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:36,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash 49996, now seen corresponding path program 1 times [2023-08-30 04:03:36,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:36,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073434843] [2023-08-30 04:03:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:36,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:36,775 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 04:03:36,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073434843] [2023-08-30 04:03:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073434843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:36,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864560022] [2023-08-30 04:03:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 373 [2023-08-30 04:03:36,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 04:03:36,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:36,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 373 [2023-08-30 04:03:36,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:06,311 INFO L130 PetriNetUnfolder]: 378216/519899 cut-off events. [2023-08-30 04:04:06,311 INFO L131 PetriNetUnfolder]: For 14786/14786 co-relation queries the response was YES. [2023-08-30 04:04:07,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020299 conditions, 519899 events. 378216/519899 cut-off events. For 14786/14786 co-relation queries the response was YES. Maximal size of possible extension queue 11312. Compared 4158406 event pairs, 313434 based on Foata normal form. 84825/545140 useless extension candidates. Maximal degree in co-relation 88278. Up to 416893 conditions per place. [2023-08-30 04:04:08,756 INFO L137 encePairwiseOnDemand]: 342/373 looper letters, 84 selfloop transitions, 2 changer transitions 1/103 dead transitions. [2023-08-30 04:04:08,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 424 flow [2023-08-30 04:04:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2023-08-30 04:04:08,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58266309204647 [2023-08-30 04:04:08,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2023-08-30 04:04:08,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2023-08-30 04:04:08,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:08,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2023-08-30 04:04:08,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 04:04:08,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 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 04:04:08,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 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 04:04:08,762 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 652 transitions. [2023-08-30 04:04:08,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 424 flow [2023-08-30 04:04:08,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:04:08,766 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 190 flow [2023-08-30 04:04:08,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-08-30 04:04:08,767 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:04:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 190 flow [2023-08-30 04:04:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 04:04:08,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:08,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:08,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:04:08,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:08,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 49997, now seen corresponding path program 1 times [2023-08-30 04:04:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916307953] [2023-08-30 04:04:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:08,805 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 04:04:08,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:08,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916307953] [2023-08-30 04:04:08,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916307953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:08,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:08,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:08,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833317799] [2023-08-30 04:04:08,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:08,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:08,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:08,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 373 [2023-08-30 04:04:08,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 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 04:04:08,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:08,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 373 [2023-08-30 04:04:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:34,301 INFO L130 PetriNetUnfolder]: 349614/484640 cut-off events. [2023-08-30 04:04:34,301 INFO L131 PetriNetUnfolder]: For 21616/21616 co-relation queries the response was YES. [2023-08-30 04:04:34,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956433 conditions, 484640 events. 349614/484640 cut-off events. For 21616/21616 co-relation queries the response was YES. Maximal size of possible extension queue 10662. Compared 3867383 event pairs, 252826 based on Foata normal form. 0/444606 useless extension candidates. Maximal degree in co-relation 870252. Up to 454474 conditions per place. [2023-08-30 04:04:36,885 INFO L137 encePairwiseOnDemand]: 368/373 looper letters, 63 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 04:04:36,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 340 flow [2023-08-30 04:04:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-30 04:04:36,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272564789991063 [2023-08-30 04:04:36,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-30 04:04:36,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-30 04:04:36,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:36,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-30 04:04:36,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 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 04:04:36,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 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 04:04:36,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 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 04:04:36,891 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 190 flow. Second operand 3 states and 590 transitions. [2023-08-30 04:04:36,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 340 flow [2023-08-30 04:04:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:04:41,301 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 202 flow [2023-08-30 04:04:41,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-30 04:04:41,303 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:04:41,303 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 202 flow [2023-08-30 04:04:41,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 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 04:04:41,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:41,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:04:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:04:41,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:41,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1028394980, now seen corresponding path program 1 times [2023-08-30 04:04:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627370375] [2023-08-30 04:04:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:41,399 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 04:04:41,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:41,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627370375] [2023-08-30 04:04:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627370375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813822285] [2023-08-30 04:04:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:41,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:41,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:41,402 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 04:04:41,403 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 04:04:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:04:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:41,481 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 04:04:41,522 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 04:04:41,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:41,552 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 04:04:41,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813822285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:41,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:41,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:04:41,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766884372] [2023-08-30 04:04:41,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:41,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:04:41,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:04:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:04:41,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 373 [2023-08-30 04:04:41,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 171.875) internal successors, (1375), 8 states have internal predecessors, (1375), 0 states have call successors, (0), 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 04:04:41,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:41,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 373 [2023-08-30 04:04:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:02,183 INFO L130 PetriNetUnfolder]: 314386/417040 cut-off events. [2023-08-30 04:05:02,183 INFO L131 PetriNetUnfolder]: For 18317/18317 co-relation queries the response was YES. [2023-08-30 04:05:02,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853435 conditions, 417040 events. 314386/417040 cut-off events. For 18317/18317 co-relation queries the response was YES. Maximal size of possible extension queue 9175. Compared 3063302 event pairs, 5786 based on Foata normal form. 738/388111 useless extension candidates. Maximal degree in co-relation 760009. Up to 315686 conditions per place. [2023-08-30 04:05:04,156 INFO L137 encePairwiseOnDemand]: 366/373 looper letters, 163 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2023-08-30 04:05:04,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 186 transitions, 772 flow [2023-08-30 04:05:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:05:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:05:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1370 transitions. [2023-08-30 04:05:04,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247031788586748 [2023-08-30 04:05:04,159 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1370 transitions. [2023-08-30 04:05:04,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1370 transitions. [2023-08-30 04:05:04,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:04,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1370 transitions. [2023-08-30 04:05:04,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.71428571428572) internal successors, (1370), 7 states have internal predecessors, (1370), 0 states have call successors, (0), 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 04:05:04,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 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 04:05:04,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 373.0) internal successors, (2984), 8 states have internal predecessors, (2984), 0 states have call successors, (0), 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 04:05:04,164 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 202 flow. Second operand 7 states and 1370 transitions. [2023-08-30 04:05:04,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 186 transitions, 772 flow [2023-08-30 04:05:04,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 186 transitions, 770 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:05:04,168 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 244 flow [2023-08-30 04:05:04,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=244, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-08-30 04:05:04,169 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2023-08-30 04:05:04,169 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 244 flow [2023-08-30 04:05:04,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.875) internal successors, (1375), 8 states have internal predecessors, (1375), 0 states have call successors, (0), 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 04:05:04,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:04,169 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:05:04,175 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 04:05:04,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 04:05:04,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:04,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash 223275030, now seen corresponding path program 1 times [2023-08-30 04:05:04,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:04,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374937258] [2023-08-30 04:05:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:04,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:05:04,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:05:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:05:04,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:05:04,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:05:04,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:05:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:05:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:05:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:05:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:05:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:05:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:05:04,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:05:04,401 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:05:04,402 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:05:04,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:05:04,421 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:05:04,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 247 transitions, 554 flow [2023-08-30 04:05:04,501 INFO L130 PetriNetUnfolder]: 158/1071 cut-off events. [2023-08-30 04:05:04,501 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:05:04,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 1071 events. 158/1071 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5281 event pairs, 23 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 711. Up to 80 conditions per place. [2023-08-30 04:05:04,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 247 transitions, 554 flow [2023-08-30 04:05:04,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 247 transitions, 554 flow [2023-08-30 04:05:04,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:05:04,514 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 247 transitions, 554 flow [2023-08-30 04:05:04,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 247 transitions, 554 flow [2023-08-30 04:05:04,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 247 transitions, 554 flow [2023-08-30 04:05:04,736 INFO L130 PetriNetUnfolder]: 158/1071 cut-off events. [2023-08-30 04:05:04,736 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:05:04,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 1071 events. 158/1071 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5281 event pairs, 23 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 711. Up to 80 conditions per place. [2023-08-30 04:05:04,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 33880 [2023-08-30 04:05:07,695 INFO L134 LiptonReduction]: Checked pairs total: 104763 [2023-08-30 04:05:07,695 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-30 04:05:07,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:05:07,696 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;@6e7ff301, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:05:07,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:05:07,697 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:05:07,697 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:05:07,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:07,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:05:07,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:07,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash 64208, now seen corresponding path program 1 times [2023-08-30 04:05:07,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:07,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921515041] [2023-08-30 04:05:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:07,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:07,726 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 04:05:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921515041] [2023-08-30 04:05:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921515041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:05:07,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:05:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:05:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144078171] [2023-08-30 04:05:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:05:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:05:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:05:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:05:07,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 413 [2023-08-30 04:05:07,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 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 04:05:07,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:07,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 413 [2023-08-30 04:05:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand