./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.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_41-trylock_racefree.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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --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 04:12:21,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:12:21,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:12:21,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:12:21,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:12:21,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:12:21,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:12:21,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:12:21,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:12:21,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:12:21,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:12:21,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:12:21,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:12:21,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:12:21,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:12:21,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:12:21,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:12:21,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:12:21,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:12:21,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:12:21,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:12:21,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:12:21,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:12:21,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:12:21,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:12:21,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:12:21,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:12:21,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:12:21,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:12:21,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:12:21,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:12:21,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:12:21,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:12:21,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:12:21,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:12:21,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:12:21,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:12:21,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:12:21,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:12:21,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:12:21,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:12:21,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:12:21,197 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:12:21,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:12:21,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:12:21,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:12:21,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:12:21,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:12:21,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:12:21,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:12:21,200 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:12:21,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:12:21,201 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:12:21,201 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:12:21,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:12:21,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:12:21,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:12:21,202 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:12:21,202 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:12:21,202 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:12:21,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:12:21,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:12:21,203 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:12:21,203 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:12:21,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:12:21,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:12:21,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:12:21,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:12:21,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:12:21,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:12:21,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:12:21,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:12:21,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:12:21,205 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:12:21,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:12:21,205 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:12:21,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:12:21,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:12:21,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:12:21,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:12:21,509 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:12:21,509 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:12:21,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-30 04:12:22,726 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:12:23,034 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:12:23,036 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-30 04:12:23,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfd6044c1/a5f7239ded93451b9565107b1b333a15/FLAGf4c73837c [2023-08-30 04:12:23,073 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfd6044c1/a5f7239ded93451b9565107b1b333a15 [2023-08-30 04:12:23,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:12:23,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:12:23,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:12:23,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:12:23,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:12:23,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471d116e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23, skipping insertion in model container [2023-08-30 04:12:23,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:12:23,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:12:23,440 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_41-trylock_racefree.i[30176,30189] [2023-08-30 04:12:23,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:12:23,472 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:12:23,510 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_41-trylock_racefree.i[30176,30189] [2023-08-30 04:12:23,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:12:23,584 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:12:23,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23 WrapperNode [2023-08-30 04:12:23,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:12:23,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:12:23,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:12:23,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:12:23,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,622 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-08-30 04:12:23,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:12:23,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:12:23,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:12:23,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:12:23,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:12:23,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:12:23,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:12:23,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:12:23,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (1/1) ... [2023-08-30 04:12:23,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:12:23,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:12:23,690 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 04:12:23,701 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 04:12:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:12:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:12:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:12:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:12:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:12:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:12:23,728 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:12:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:12:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-30 04:12:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:12:23,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:12:23,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:12:23,730 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 04:12:23,828 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:12:23,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:12:24,060 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:12:24,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:12:24,067 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 04:12:24,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:12:24 BoogieIcfgContainer [2023-08-30 04:12:24,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:12:24,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:12:24,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:12:24,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:12:24,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:12:23" (1/3) ... [2023-08-30 04:12:24,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5bdf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:12:24, skipping insertion in model container [2023-08-30 04:12:24,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:12:23" (2/3) ... [2023-08-30 04:12:24,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5bdf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:12:24, skipping insertion in model container [2023-08-30 04:12:24,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:12:24" (3/3) ... [2023-08-30 04:12:24,076 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-30 04:12:24,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:12:24,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:12:24,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:12:24,139 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:12:24,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 111 transitions, 230 flow [2023-08-30 04:12:24,236 INFO L130 PetriNetUnfolder]: 21/155 cut-off events. [2023-08-30 04:12:24,237 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:12:24,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 21/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 414 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2023-08-30 04:12:24,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 111 transitions, 230 flow [2023-08-30 04:12:24,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 111 transitions, 230 flow [2023-08-30 04:12:24,252 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:12:24,264 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 111 transitions, 230 flow [2023-08-30 04:12:24,266 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 111 transitions, 230 flow [2023-08-30 04:12:24,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 111 transitions, 230 flow [2023-08-30 04:12:24,306 INFO L130 PetriNetUnfolder]: 21/155 cut-off events. [2023-08-30 04:12:24,307 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:12:24,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 21/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 414 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2023-08-30 04:12:24,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-30 04:12:26,785 INFO L134 LiptonReduction]: Checked pairs total: 4682 [2023-08-30 04:12:26,786 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-30 04:12:26,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:26,806 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;@30aaee88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:26,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:12:26,808 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:12:26,808 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:26,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:26,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:26,809 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 04:12:26,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 13818, now seen corresponding path program 1 times [2023-08-30 04:12:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687927798] [2023-08-30 04:12:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:26,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:27,119 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 04:12:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:27,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687927798] [2023-08-30 04:12:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687927798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:27,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:27,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86222250] [2023-08-30 04:12:27,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:27,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-30 04:12:27,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 04:12:27,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:27,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-30 04:12:27,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:27,321 INFO L130 PetriNetUnfolder]: 137/303 cut-off events. [2023-08-30 04:12:27,321 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:12:27,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 303 events. 137/303 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1128 event pairs, 105 based on Foata normal form. 17/234 useless extension candidates. Maximal degree in co-relation 579. Up to 289 conditions per place. [2023-08-30 04:12:27,324 INFO L137 encePairwiseOnDemand]: 190/202 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-30 04:12:27,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 168 flow [2023-08-30 04:12:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-30 04:12:27,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412541254125413 [2023-08-30 04:12:27,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-30 04:12:27,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-30 04:12:27,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:27,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-30 04:12:27,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 04:12:27,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:27,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:27,350 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 328 transitions. [2023-08-30 04:12:27,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 168 flow [2023-08-30 04:12:27,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:12:27,354 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 78 flow [2023-08-30 04:12:27,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 04:12:27,358 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-30 04:12:27,358 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 78 flow [2023-08-30 04:12:27,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 04:12:27,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:27,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:12:27,360 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 04:12:27,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 13817, now seen corresponding path program 1 times [2023-08-30 04:12:27,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:27,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706711179] [2023-08-30 04:12:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:27,397 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 04:12:27,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:27,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706711179] [2023-08-30 04:12:27,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706711179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:27,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:27,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840757181] [2023-08-30 04:12:27,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:27,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:27,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 202 [2023-08-30 04:12:27,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 04:12:27,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:27,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 202 [2023-08-30 04:12:27,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:27,509 INFO L130 PetriNetUnfolder]: 113/250 cut-off events. [2023-08-30 04:12:27,510 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:12:27,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 250 events. 113/250 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 884 event pairs, 96 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 513. Up to 228 conditions per place. [2023-08-30 04:12:27,514 INFO L137 encePairwiseOnDemand]: 198/202 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-30 04:12:27,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 158 flow [2023-08-30 04:12:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-30 04:12:27,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49504950495049505 [2023-08-30 04:12:27,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-30 04:12:27,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-30 04:12:27,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:27,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-30 04:12:27,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 04:12:27,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:27,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:27,525 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 78 flow. Second operand 3 states and 300 transitions. [2023-08-30 04:12:27,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 158 flow [2023-08-30 04:12:27,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:27,527 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 74 flow [2023-08-30 04:12:27,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=74, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-30 04:12:27,528 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 04:12:27,529 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 74 flow [2023-08-30 04:12:27,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 04:12:27,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:27,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:12:27,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:12:27,530 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 04:12:27,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash 411902882, now seen corresponding path program 1 times [2023-08-30 04:12:27,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:27,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138030224] [2023-08-30 04:12:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:27,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:27,671 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 04:12:27,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138030224] [2023-08-30 04:12:27,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138030224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:12:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863291840] [2023-08-30 04:12:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:27,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:27,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:12:27,681 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 04:12:27,713 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 04:12:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:12:27,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:12:27,827 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 04:12:27,904 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 04:12:27,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:12:27,962 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 04:12:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863291840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:12:27,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:12:27,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:12:27,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970959765] [2023-08-30 04:12:27,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:12:27,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:12:27,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:12:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:12:28,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 202 [2023-08-30 04:12:28,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 8 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 0 states have call successors, (0), 0 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 04:12:28,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:28,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 202 [2023-08-30 04:12:28,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:28,168 INFO L130 PetriNetUnfolder]: 16/55 cut-off events. [2023-08-30 04:12:28,169 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:28,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 55 events. 16/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 131 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 118. Up to 34 conditions per place. [2023-08-30 04:12:28,169 INFO L137 encePairwiseOnDemand]: 198/202 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 04:12:28,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 97 flow [2023-08-30 04:12:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:12:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:12:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2023-08-30 04:12:28,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591584158415842 [2023-08-30 04:12:28,172 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2023-08-30 04:12:28,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2023-08-30 04:12:28,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:28,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2023-08-30 04:12:28,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 04:12:28,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 04:12:28,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 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 04:12:28,175 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 4 states and 371 transitions. [2023-08-30 04:12:28,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 97 flow [2023-08-30 04:12:28,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:28,177 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 38 flow [2023-08-30 04:12:28,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=38, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2023-08-30 04:12:28,178 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -11 predicate places. [2023-08-30 04:12:28,178 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 38 flow [2023-08-30 04:12:28,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 0 states have call successors, (0), 0 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 04:12:28,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:28,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:12:28,190 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 04:12:28,384 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 04:12:28,384 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 04:12:28,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash -115912299, now seen corresponding path program 1 times [2023-08-30 04:12:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:28,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334948953] [2023-08-30 04:12:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:28,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:28,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:12:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:28,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:12:28,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:12:28,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:12:28,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:12:28,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:12:28,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:12:28,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:12:28,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:12:28,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:12:28,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:12:28,443 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:12:28,446 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:12:28,446 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:12:28,469 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:12:28,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 141 transitions, 300 flow [2023-08-30 04:12:28,505 INFO L130 PetriNetUnfolder]: 37/258 cut-off events. [2023-08-30 04:12:28,505 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:12:28,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 258 events. 37/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 157. Up to 9 conditions per place. [2023-08-30 04:12:28,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 141 transitions, 300 flow [2023-08-30 04:12:28,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 141 transitions, 300 flow [2023-08-30 04:12:28,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:12:28,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 141 transitions, 300 flow [2023-08-30 04:12:28,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 141 transitions, 300 flow [2023-08-30 04:12:28,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 141 transitions, 300 flow [2023-08-30 04:12:28,553 INFO L130 PetriNetUnfolder]: 37/258 cut-off events. [2023-08-30 04:12:28,554 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:12:28,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 258 events. 37/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 157. Up to 9 conditions per place. [2023-08-30 04:12:28,561 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-30 04:12:30,755 INFO L134 LiptonReduction]: Checked pairs total: 18164 [2023-08-30 04:12:30,755 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-30 04:12:30,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:30,758 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;@30aaee88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:30,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:12:30,760 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:12:30,760 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:30,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:30,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:30,760 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 04:12:30,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash 22552, now seen corresponding path program 1 times [2023-08-30 04:12:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:30,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112004050] [2023-08-30 04:12:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:30,803 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 04:12:30,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112004050] [2023-08-30 04:12:30,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112004050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:30,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:30,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:30,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771867906] [2023-08-30 04:12:30,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:30,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:30,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:30,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 243 [2023-08-30 04:12:30,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 04:12:30,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:30,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 243 [2023-08-30 04:12:30,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:31,231 INFO L130 PetriNetUnfolder]: 2359/4103 cut-off events. [2023-08-30 04:12:31,231 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 04:12:31,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7968 conditions, 4103 events. 2359/4103 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 25496 event pairs, 1080 based on Foata normal form. 628/3937 useless extension candidates. Maximal degree in co-relation 928. Up to 3790 conditions per place. [2023-08-30 04:12:31,251 INFO L137 encePairwiseOnDemand]: 225/243 looper letters, 45 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-30 04:12:31,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 230 flow [2023-08-30 04:12:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-30 04:12:31,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610425240054869 [2023-08-30 04:12:31,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-30 04:12:31,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-30 04:12:31,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:31,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-30 04:12:31,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 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 04:12:31,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 04:12:31,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 04:12:31,257 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 409 transitions. [2023-08-30 04:12:31,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 230 flow [2023-08-30 04:12:31,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:12:31,259 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 126 flow [2023-08-30 04:12:31,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-08-30 04:12:31,260 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 04:12:31,260 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 126 flow [2023-08-30 04:12:31,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 04:12:31,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:31,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:12:31,261 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 04:12:31,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash 22551, now seen corresponding path program 1 times [2023-08-30 04:12:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:31,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691264910] [2023-08-30 04:12:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:31,282 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 04:12:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691264910] [2023-08-30 04:12:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691264910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:31,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:31,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341679462] [2023-08-30 04:12:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:31,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:31,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:31,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 243 [2023-08-30 04:12:31,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 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 04:12:31,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:31,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 243 [2023-08-30 04:12:31,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:31,633 INFO L130 PetriNetUnfolder]: 1941/3300 cut-off events. [2023-08-30 04:12:31,633 INFO L131 PetriNetUnfolder]: For 206/206 co-relation queries the response was YES. [2023-08-30 04:12:31,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6731 conditions, 3300 events. 1941/3300 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 19198 event pairs, 1710 based on Foata normal form. 0/2848 useless extension candidates. Maximal degree in co-relation 6665. Up to 2889 conditions per place. [2023-08-30 04:12:31,654 INFO L137 encePairwiseOnDemand]: 239/243 looper letters, 49 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-30 04:12:31,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 254 flow [2023-08-30 04:12:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-30 04:12:31,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52400548696845 [2023-08-30 04:12:31,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-30 04:12:31,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-30 04:12:31,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:31,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-30 04:12:31,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 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 04:12:31,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 04:12:31,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 04:12:31,660 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 126 flow. Second operand 3 states and 382 transitions. [2023-08-30 04:12:31,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 254 flow [2023-08-30 04:12:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:12:31,667 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 124 flow [2023-08-30 04:12:31,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=120, 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=124, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 04:12:31,670 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-30 04:12:31,671 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 124 flow [2023-08-30 04:12:31,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 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 04:12:31,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:31,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:12:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:12:31,672 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 04:12:31,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash -631956674, now seen corresponding path program 1 times [2023-08-30 04:12:31,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:31,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860935111] [2023-08-30 04:12:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:31,764 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 04:12:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:31,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860935111] [2023-08-30 04:12:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860935111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:12:31,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495330770] [2023-08-30 04:12:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:31,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:12:31,780 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 04:12:31,781 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 04:12:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:12:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:12:31,862 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 04:12:31,909 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 04:12:31,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:12:31,948 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 04:12:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495330770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:12:31,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:12:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:12:31,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681290835] [2023-08-30 04:12:31,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:12:31,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:12:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:12:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:12:32,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 243 [2023-08-30 04:12:32,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 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 04:12:32,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:32,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 243 [2023-08-30 04:12:32,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:32,328 INFO L130 PetriNetUnfolder]: 1749/2928 cut-off events. [2023-08-30 04:12:32,329 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-08-30 04:12:32,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6168 conditions, 2928 events. 1749/2928 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 17232 event pairs, 1 based on Foata normal form. 8/2701 useless extension candidates. Maximal degree in co-relation 5604. Up to 2394 conditions per place. [2023-08-30 04:12:32,346 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 70 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-30 04:12:32,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 346 flow [2023-08-30 04:12:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:12:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:12:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-30 04:12:32,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160493827160494 [2023-08-30 04:12:32,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-30 04:12:32,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-30 04:12:32,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:32,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-30 04:12:32,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 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 04:12:32,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 04:12:32,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 04:12:32,355 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 5 states and 627 transitions. [2023-08-30 04:12:32,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 346 flow [2023-08-30 04:12:32,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:32,361 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 128 flow [2023-08-30 04:12:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=116, 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=128, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-30 04:12:32,361 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 04:12:32,362 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 128 flow [2023-08-30 04:12:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 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 04:12:32,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:32,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:12:32,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:12:32,568 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 04:12:32,568 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 04:12:32,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash -329143656, now seen corresponding path program 1 times [2023-08-30 04:12:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:32,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371749065] [2023-08-30 04:12:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:32,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:12:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:32,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:12:32,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:12:32,601 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:12:32,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:12:32,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:12:32,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:12:32,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:12:32,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:12:32,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:12:32,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:12:32,602 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:12:32,603 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:12:32,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:12:32,628 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:12:32,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 171 transitions, 372 flow [2023-08-30 04:12:32,666 INFO L130 PetriNetUnfolder]: 58/402 cut-off events. [2023-08-30 04:12:32,667 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:12:32,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 58/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1402 event pairs, 1 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 266. Up to 16 conditions per place. [2023-08-30 04:12:32,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 171 transitions, 372 flow [2023-08-30 04:12:32,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 171 transitions, 372 flow [2023-08-30 04:12:32,672 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:12:32,672 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 171 transitions, 372 flow [2023-08-30 04:12:32,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 171 transitions, 372 flow [2023-08-30 04:12:32,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 171 transitions, 372 flow [2023-08-30 04:12:32,704 INFO L130 PetriNetUnfolder]: 58/402 cut-off events. [2023-08-30 04:12:32,704 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:12:32,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 58/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1402 event pairs, 1 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 266. Up to 16 conditions per place. [2023-08-30 04:12:32,718 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-30 04:12:34,915 INFO L134 LiptonReduction]: Checked pairs total: 35730 [2023-08-30 04:12:34,916 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-30 04:12:34,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:34,918 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;@30aaee88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:34,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:12:34,919 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:12:34,919 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:34,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:34,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:34,920 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 04:12:34,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash 32695, now seen corresponding path program 1 times [2023-08-30 04:12:34,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:34,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869168914] [2023-08-30 04:12:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:34,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:34,948 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 04:12:34,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:34,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869168914] [2023-08-30 04:12:34,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869168914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:34,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:34,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418765001] [2023-08-30 04:12:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:34,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:34,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:34,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:34,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 287 [2023-08-30 04:12:34,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 83 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 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 04:12:34,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:34,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 287 [2023-08-30 04:12:34,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:38,000 INFO L130 PetriNetUnfolder]: 26456/39784 cut-off events. [2023-08-30 04:12:38,000 INFO L131 PetriNetUnfolder]: For 889/889 co-relation queries the response was YES. [2023-08-30 04:12:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77733 conditions, 39784 events. 26456/39784 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 287866 event pairs, 21927 based on Foata normal form. 7208/41038 useless extension candidates. Maximal degree in co-relation 17695. Up to 31908 conditions per place. [2023-08-30 04:12:38,203 INFO L137 encePairwiseOnDemand]: 261/287 looper letters, 64 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2023-08-30 04:12:38,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 326 flow [2023-08-30 04:12:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-30 04:12:38,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2023-08-30 04:12:38,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-30 04:12:38,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-30 04:12:38,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:38,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-30 04:12:38,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:38,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 04:12:38,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 04:12:38,210 INFO L175 Difference]: Start difference. First operand has 65 places, 83 transitions, 196 flow. Second operand 3 states and 504 transitions. [2023-08-30 04:12:38,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 326 flow [2023-08-30 04:12:38,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:12:38,216 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 150 flow [2023-08-30 04:12:38,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=150, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-30 04:12:38,217 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-08-30 04:12:38,218 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 150 flow [2023-08-30 04:12:38,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 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 04:12:38,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:38,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:38,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:12:38,219 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 04:12:38,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 32696, now seen corresponding path program 1 times [2023-08-30 04:12:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266685813] [2023-08-30 04:12:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:38,259 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 04:12:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266685813] [2023-08-30 04:12:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266685813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:38,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:38,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411085868] [2023-08-30 04:12:38,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:38,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:38,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:38,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 287 [2023-08-30 04:12:38,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 04:12:38,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:38,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 287 [2023-08-30 04:12:38,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:40,647 INFO L130 PetriNetUnfolder]: 24574/36808 cut-off events. [2023-08-30 04:12:40,647 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2023-08-30 04:12:40,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72852 conditions, 36808 events. 24574/36808 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 259271 event pairs, 22734 based on Foata normal form. 0/32450 useless extension candidates. Maximal degree in co-relation 66634. Up to 34569 conditions per place. [2023-08-30 04:12:40,828 INFO L137 encePairwiseOnDemand]: 283/287 looper letters, 52 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-30 04:12:40,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 278 flow [2023-08-30 04:12:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-30 04:12:40,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354239256678281 [2023-08-30 04:12:40,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-30 04:12:40,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-30 04:12:40,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:40,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-30 04:12:40,835 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 04:12:40,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 04:12:40,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 04:12:40,839 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 150 flow. Second operand 3 states and 461 transitions. [2023-08-30 04:12:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 278 flow [2023-08-30 04:12:40,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:40,890 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 160 flow [2023-08-30 04:12:40,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-30 04:12:40,892 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-08-30 04:12:40,892 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 160 flow [2023-08-30 04:12:40,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 04:12:40,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:40,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:12:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:12:40,893 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 04:12:40,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash 155545129, now seen corresponding path program 1 times [2023-08-30 04:12:40,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861457919] [2023-08-30 04:12:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:41,114 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 04:12:41,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861457919] [2023-08-30 04:12:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861457919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:12:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231913330] [2023-08-30 04:12:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:41,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:12:41,117 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 04:12:41,120 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 04:12:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:12:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:12:41,193 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 04:12:41,223 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 04:12:41,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:12:41,262 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 04:12:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231913330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:12:41,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:12:41,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:12:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006931022] [2023-08-30 04:12:41,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:12:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:12:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:12:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:12:41,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 287 [2023-08-30 04:12:41,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 04:12:41,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:41,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 287 [2023-08-30 04:12:41,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:43,268 INFO L130 PetriNetUnfolder]: 23378/34693 cut-off events. [2023-08-30 04:12:43,268 INFO L131 PetriNetUnfolder]: For 2787/2787 co-relation queries the response was YES. [2023-08-30 04:12:43,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70611 conditions, 34693 events. 23378/34693 cut-off events. For 2787/2787 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 239116 event pairs, 4741 based on Foata normal form. 9/31351 useless extension candidates. Maximal degree in co-relation 62746. Up to 25741 conditions per place. [2023-08-30 04:12:43,588 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 124 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-30 04:12:43,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 144 transitions, 598 flow [2023-08-30 04:12:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:12:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:12:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 926 transitions. [2023-08-30 04:12:43,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537746806039489 [2023-08-30 04:12:43,595 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 926 transitions. [2023-08-30 04:12:43,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 926 transitions. [2023-08-30 04:12:43,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:43,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 926 transitions. [2023-08-30 04:12:43,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 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 04:12:43,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 0 states have call successors, (0), 0 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 04:12:43,603 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 0 states have call successors, (0), 0 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 04:12:43,603 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 160 flow. Second operand 6 states and 926 transitions. [2023-08-30 04:12:43,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 144 transitions, 598 flow [2023-08-30 04:12:43,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 144 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:12:43,607 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 176 flow [2023-08-30 04:12:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=154, 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=176, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-30 04:12:43,609 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:12:43,609 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 176 flow [2023-08-30 04:12:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 04:12:43,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:43,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:12:43,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 04:12:43,813 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 04:12:43,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:12:43,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 266923015, now seen corresponding path program 1 times [2023-08-30 04:12:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624483386] [2023-08-30 04:12:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:43,883 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 04:12:43,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:43,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624483386] [2023-08-30 04:12:43,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624483386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:43,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:43,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:43,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712978133] [2023-08-30 04:12:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:43,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 287 [2023-08-30 04:12:43,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 04:12:43,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:43,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 287 [2023-08-30 04:12:43,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:46,546 INFO L130 PetriNetUnfolder]: 29490/43421 cut-off events. [2023-08-30 04:12:46,546 INFO L131 PetriNetUnfolder]: For 6765/6765 co-relation queries the response was YES. [2023-08-30 04:12:46,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89942 conditions, 43421 events. 29490/43421 cut-off events. For 6765/6765 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 294344 event pairs, 12139 based on Foata normal form. 0/40696 useless extension candidates. Maximal degree in co-relation 48492. Up to 40122 conditions per place. [2023-08-30 04:12:46,713 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 70 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 04:12:46,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 410 flow [2023-08-30 04:12:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-30 04:12:46,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2023-08-30 04:12:46,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-30 04:12:46,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-30 04:12:46,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:46,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-30 04:12:46,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 04:12:46,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 04:12:46,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 04:12:46,719 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 176 flow. Second operand 3 states and 468 transitions. [2023-08-30 04:12:46,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 410 flow [2023-08-30 04:12:46,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 398 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:46,725 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 195 flow [2023-08-30 04:12:46,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-08-30 04:12:46,725 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-30 04:12:46,725 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 195 flow [2023-08-30 04:12:46,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 04:12:46,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:46,726 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:12:46,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:12:46,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:12:46,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash -166844160, now seen corresponding path program 1 times [2023-08-30 04:12:46,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:46,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120210529] [2023-08-30 04:12:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:46,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:12:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:46,764 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:12:46,764 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:12:46,765 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:12:46,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:12:46,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:12:46,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:12:46,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:12:46,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:12:46,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:12:46,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:12:46,766 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:12:46,767 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:12:46,767 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:12:46,784 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:12:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 446 flow [2023-08-30 04:12:46,838 INFO L130 PetriNetUnfolder]: 91/630 cut-off events. [2023-08-30 04:12:46,838 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:12:46,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 630 events. 91/630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2593 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2023-08-30 04:12:46,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 446 flow [2023-08-30 04:12:46,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 201 transitions, 446 flow [2023-08-30 04:12:46,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:12:46,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 201 transitions, 446 flow [2023-08-30 04:12:46,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 201 transitions, 446 flow [2023-08-30 04:12:46,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 446 flow [2023-08-30 04:12:46,897 INFO L130 PetriNetUnfolder]: 91/630 cut-off events. [2023-08-30 04:12:46,897 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:12:46,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 630 events. 91/630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2593 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2023-08-30 04:12:46,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-30 04:12:49,326 INFO L134 LiptonReduction]: Checked pairs total: 61097 [2023-08-30 04:12:49,327 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-30 04:12:49,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:49,331 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;@30aaee88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:49,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:12:49,332 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:12:49,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:49,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:49,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:49,333 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 04:12:49,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash 44313, now seen corresponding path program 1 times [2023-08-30 04:12:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:49,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701175712] [2023-08-30 04:12:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:49,356 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 04:12:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:49,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701175712] [2023-08-30 04:12:49,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701175712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:49,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:49,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916789907] [2023-08-30 04:12:49,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:49,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:49,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 333 [2023-08-30 04:12:49,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 04:12:49,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:49,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 333 [2023-08-30 04:12:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:23,055 INFO L130 PetriNetUnfolder]: 378028/512051 cut-off events. [2023-08-30 04:13:23,055 INFO L131 PetriNetUnfolder]: For 14823/14823 co-relation queries the response was YES. [2023-08-30 04:13:24,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011993 conditions, 512051 events. 378028/512051 cut-off events. For 14823/14823 co-relation queries the response was YES. Maximal size of possible extension queue 10347. Compared 3928585 event pairs, 313265 based on Foata normal form. 82977/537524 useless extension candidates. Maximal degree in co-relation 86886. Up to 416615 conditions per place. [2023-08-30 04:13:25,907 INFO L137 encePairwiseOnDemand]: 302/333 looper letters, 84 selfloop transitions, 2 changer transitions 1/103 dead transitions. [2023-08-30 04:13:25,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 424 flow [2023-08-30 04:13:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-30 04:13:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016016016016016 [2023-08-30 04:13:25,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-30 04:13:25,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-30 04:13:25,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:25,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-30 04:13:25,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 04:13:25,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 04:13:25,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 04:13:25,912 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 601 transitions. [2023-08-30 04:13:25,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 424 flow [2023-08-30 04:13:25,916 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 04:13:25,917 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 190 flow [2023-08-30 04:13:25,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, 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 04:13:25,917 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:13:25,918 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 190 flow [2023-08-30 04:13:25,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 04:13:25,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:25,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:13:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:13:25,918 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 04:13:25,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash 44314, now seen corresponding path program 1 times [2023-08-30 04:13:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:25,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642948400] [2023-08-30 04:13:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:25,966 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 04:13:25,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:25,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642948400] [2023-08-30 04:13:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642948400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:13:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:13:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:13:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393273730] [2023-08-30 04:13:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:13:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:13:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:13:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:13:25,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 333 [2023-08-30 04:13:25,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 04:13:25,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:25,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 333 [2023-08-30 04:13:25,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:54,373 INFO L130 PetriNetUnfolder]: 349426/475882 cut-off events. [2023-08-30 04:13:54,373 INFO L131 PetriNetUnfolder]: For 21244/21244 co-relation queries the response was YES. [2023-08-30 04:13:55,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947217 conditions, 475882 events. 349426/475882 cut-off events. For 21244/21244 co-relation queries the response was YES. Maximal size of possible extension queue 9705. Compared 3622234 event pairs, 252737 based on Foata normal form. 0/437319 useless extension candidates. Maximal degree in co-relation 861774. Up to 454196 conditions per place. [2023-08-30 04:13:57,606 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 63 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 04:13:57,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 340 flow [2023-08-30 04:13:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-30 04:13:57,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385385385385385 [2023-08-30 04:13:57,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-30 04:13:57,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-30 04:13:57,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:57,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-30 04:13:57,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 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 04:13:57,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 04:13:57,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 04:13:57,631 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 190 flow. Second operand 3 states and 538 transitions. [2023-08-30 04:13:57,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 340 flow [2023-08-30 04:14:04,040 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 04:14:04,042 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 200 flow [2023-08-30 04:14:04,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, 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=200, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-30 04:14:04,043 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:14:04,043 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 200 flow [2023-08-30 04:14:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 04:14:04,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:04,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:14:04,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:14:04,044 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 04:14:04,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1989295631, now seen corresponding path program 1 times [2023-08-30 04:14:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:04,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857894815] [2023-08-30 04:14:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:04,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:04,150 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 04:14:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:04,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857894815] [2023-08-30 04:14:04,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857894815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:04,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341025805] [2023-08-30 04:14:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:04,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:04,154 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 04:14:04,155 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 04:14:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:04,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:14:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:04,254 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 04:14:04,299 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 04:14:04,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:04,338 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 04:14:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341025805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:04,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:14:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011201306] [2023-08-30 04:14:04,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:04,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:14:04,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:14:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:04,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 333 [2023-08-30 04:14:04,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 154.875) internal successors, (1239), 8 states have internal predecessors, (1239), 0 states have call successors, (0), 0 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 04:14:04,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:04,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 333 [2023-08-30 04:14:04,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:29,561 INFO L130 PetriNetUnfolder]: 314335/422053 cut-off events. [2023-08-30 04:14:29,561 INFO L131 PetriNetUnfolder]: For 28036/28036 co-relation queries the response was YES. [2023-08-30 04:14:30,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855085 conditions, 422053 events. 314335/422053 cut-off events. For 28036/28036 co-relation queries the response was YES. Maximal size of possible extension queue 8507. Compared 3080382 event pairs, 49060 based on Foata normal form. 729/393117 useless extension candidates. Maximal degree in co-relation 106724. Up to 315686 conditions per place. [2023-08-30 04:14:31,850 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 162 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2023-08-30 04:14:31,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 185 transitions, 766 flow [2023-08-30 04:14:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:14:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:14:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1247 transitions. [2023-08-30 04:14:31,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534963534963535 [2023-08-30 04:14:31,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1247 transitions. [2023-08-30 04:14:31,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1247 transitions. [2023-08-30 04:14:31,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:31,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1247 transitions. [2023-08-30 04:14:31,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.14285714285714) internal successors, (1247), 7 states have internal predecessors, (1247), 0 states have call successors, (0), 0 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 04:14:31,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 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 04:14:31,860 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 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 04:14:31,861 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 200 flow. Second operand 7 states and 1247 transitions. [2023-08-30 04:14:31,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 185 transitions, 766 flow [2023-08-30 04:14:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 185 transitions, 764 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:31,866 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 236 flow [2023-08-30 04:14:31,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=194, 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=236, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-08-30 04:14:31,867 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2023-08-30 04:14:31,867 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 236 flow [2023-08-30 04:14:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.875) internal successors, (1239), 8 states have internal predecessors, (1239), 0 states have call successors, (0), 0 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 04:14:31,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:31,868 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:14:31,874 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 04:14:32,073 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,SelfDestructingSolverStorable15 [2023-08-30 04:14:32,073 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 04:14:32,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:32,073 INFO L85 PathProgramCache]: Analyzing trace with hash 980497105, now seen corresponding path program 1 times [2023-08-30 04:14:32,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:32,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030144841] [2023-08-30 04:14:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:32,090 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:14:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:32,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:14:32,110 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:14:32,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:14:32,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:14:32,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:14:32,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:14:32,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:14:32,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:14:32,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:14:32,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:14:32,113 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:14:32,113 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:14:32,113 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:14:32,145 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:14:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 231 transitions, 522 flow [2023-08-30 04:14:32,248 INFO L130 PetriNetUnfolder]: 152/1030 cut-off events. [2023-08-30 04:14:32,248 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:14:32,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1030 events. 152/1030 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5088 event pairs, 23 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 675. Up to 80 conditions per place. [2023-08-30 04:14:32,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 231 transitions, 522 flow [2023-08-30 04:14:32,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 231 transitions, 522 flow [2023-08-30 04:14:32,266 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:32,266 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 231 transitions, 522 flow [2023-08-30 04:14:32,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 231 transitions, 522 flow [2023-08-30 04:14:32,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 231 transitions, 522 flow [2023-08-30 04:14:32,539 INFO L130 PetriNetUnfolder]: 152/1030 cut-off events. [2023-08-30 04:14:32,539 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:14:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1030 events. 152/1030 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5088 event pairs, 23 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 675. Up to 80 conditions per place. [2023-08-30 04:14:32,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 32480 [2023-08-30 04:14:34,833 INFO L134 LiptonReduction]: Checked pairs total: 88945 [2023-08-30 04:14:34,833 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-30 04:14:34,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:34,835 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;@30aaee88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:34,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:14:34,836 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:14:34,836 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:34,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:34,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:34,837 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 04:14:34,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash 57337, now seen corresponding path program 1 times [2023-08-30 04:14:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:34,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805978629] [2023-08-30 04:14:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:34,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:34,872 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 04:14:34,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:34,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805978629] [2023-08-30 04:14:34,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805978629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:34,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:34,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:34,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144112852] [2023-08-30 04:14:34,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:34,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:34,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:34,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-30 04:14:34,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 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 04:14:34,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:34,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-30 04:14:34,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand