./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_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_79-equ_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 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --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 04:18:37,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:18:37,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:18:37,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:18:37,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:18:37,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:18:37,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:18:37,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:18:37,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:18:37,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:18:37,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:18:37,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:18:37,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:18:37,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:18:37,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:18:37,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:18:37,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:18:37,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:18:37,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:18:37,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:18:37,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:18:37,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:18:37,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:18:37,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:18:37,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:18:37,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:18:37,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:18:37,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:18:37,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:18:37,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:18:37,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:18:37,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:18:37,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:18:37,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:18:37,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:18:37,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:18:37,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:18:37,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:18:37,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:18:37,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:18:37,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:18:37,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:18:37,631 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:18:37,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:18:37,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:18:37,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:18:37,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:18:37,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:18:37,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:18:37,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:18:37,633 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:18:37,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:18:37,634 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:18:37,634 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:18:37,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:18:37,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:18:37,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:18:37,635 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:18:37,635 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:18:37,635 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:18:37,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:18:37,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:18:37,636 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:18:37,636 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:18:37,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:18:37,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:18:37,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:18:37,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:18:37,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:18:37,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:18:37,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:18:37,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:18:37,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:18:37,638 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:18:37,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:18:37,638 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:18:37,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:18:37,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:18:37,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:18:37,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:18:37,982 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:18:37,982 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:18:37,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-30 04:18:39,125 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:18:39,392 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:18:39,393 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-30 04:18:39,407 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/951523f1d/6314ecd6a7754933aa07228bbd1faf29/FLAGee229eb2f [2023-08-30 04:18:39,422 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/951523f1d/6314ecd6a7754933aa07228bbd1faf29 [2023-08-30 04:18:39,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:18:39,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:18:39,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:18:39,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:18:39,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:18:39,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:18:39" (1/1) ... [2023-08-30 04:18:39,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74be0c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:39, skipping insertion in model container [2023-08-30 04:18:39,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:18:39" (1/1) ... [2023-08-30 04:18:39,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:18:39,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:18:39,836 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_79-equ_racefree.i[47038,47051] [2023-08-30 04:18:39,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:18:39,879 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:18:39,951 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_79-equ_racefree.i[47038,47051] [2023-08-30 04:18:39,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:18:40,048 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:18:40,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40 WrapperNode [2023-08-30 04:18:40,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:18:40,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:18:40,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:18:40,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:18:40,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,103 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-30 04:18:40,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:18:40,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:18:40,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:18:40,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:18:40,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:18:40,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:18:40,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:18:40,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:18:40,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (1/1) ... [2023-08-30 04:18:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:18:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:18:40,173 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 04:18:40,186 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 04:18:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:18:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:18:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:18:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:18:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:18:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:18:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:18:40,212 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:18:40,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:18:40,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:18:40,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:18:40,214 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 04:18:40,418 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:18:40,420 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:18:40,791 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:18:40,798 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:18:40,798 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-30 04:18:40,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:18:40 BoogieIcfgContainer [2023-08-30 04:18:40,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:18:40,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:18:40,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:18:40,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:18:40,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:18:39" (1/3) ... [2023-08-30 04:18:40,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424e67c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:18:40, skipping insertion in model container [2023-08-30 04:18:40,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:18:40" (2/3) ... [2023-08-30 04:18:40,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424e67c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:18:40, skipping insertion in model container [2023-08-30 04:18:40,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:18:40" (3/3) ... [2023-08-30 04:18:40,813 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-08-30 04:18:40,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:18:40,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-30 04:18:40,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:18:40,934 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:18:40,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-30 04:18:41,115 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-30 04:18:41,116 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:18:41,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-30 04:18:41,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 229 transitions, 466 flow [2023-08-30 04:18:41,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 229 transitions, 466 flow [2023-08-30 04:18:41,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:18:41,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 229 transitions, 466 flow [2023-08-30 04:18:41,167 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 229 transitions, 466 flow [2023-08-30 04:18:41,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-30 04:18:41,218 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-30 04:18:41,219 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:18:41,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-30 04:18:41,231 INFO L119 LiptonReduction]: Number of co-enabled transitions 12462 [2023-08-30 04:18:48,661 INFO L134 LiptonReduction]: Checked pairs total: 29978 [2023-08-30 04:18:48,661 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-30 04:18:48,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:18:48,679 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;@1ce50f55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:18:48,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 04:18:48,682 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:18:48,683 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:18:48,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:48,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:18:48,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:18:48,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash 27925, now seen corresponding path program 1 times [2023-08-30 04:18:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303597735] [2023-08-30 04:18:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:48,916 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 04:18:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303597735] [2023-08-30 04:18:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303597735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:18:48,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:18:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:18:48,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746925024] [2023-08-30 04:18:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:18:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:18:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:18:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:18:49,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 443 [2023-08-30 04:18:49,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 04:18:49,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:49,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 443 [2023-08-30 04:18:49,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:49,293 INFO L130 PetriNetUnfolder]: 602/1372 cut-off events. [2023-08-30 04:18:49,293 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:18:49,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2564 conditions, 1372 events. 602/1372 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9227 event pairs, 532 based on Foata normal form. 102/963 useless extension candidates. Maximal degree in co-relation 2481. Up to 1143 conditions per place. [2023-08-30 04:18:49,303 INFO L137 encePairwiseOnDemand]: 413/443 looper letters, 67 selfloop transitions, 1 changer transitions 5/86 dead transitions. [2023-08-30 04:18:49,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 326 flow [2023-08-30 04:18:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:18:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:18:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-08-30 04:18:49,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252069224981188 [2023-08-30 04:18:49,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-08-30 04:18:49,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-08-30 04:18:49,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:18:49,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-08-30 04:18:49,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 04:18:49,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:49,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:49,336 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 698 transitions. [2023-08-30 04:18:49,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 326 flow [2023-08-30 04:18:49,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:18:49,342 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 143 flow [2023-08-30 04:18:49,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-08-30 04:18:49,347 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-30 04:18:49,347 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 143 flow [2023-08-30 04:18:49,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 04:18:49,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:49,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:18:49,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:18:49,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:18:49,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:49,349 INFO L85 PathProgramCache]: Analyzing trace with hash 28187, now seen corresponding path program 1 times [2023-08-30 04:18:49,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:49,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374919027] [2023-08-30 04:18:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:49,493 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 04:18:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:49,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374919027] [2023-08-30 04:18:49,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374919027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:18:49,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:18:49,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:18:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093514568] [2023-08-30 04:18:49,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:18:49,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:18:49,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:18:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:18:49,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-30 04:18:49,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:49,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:49,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-30 04:18:49,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:49,771 INFO L130 PetriNetUnfolder]: 540/1255 cut-off events. [2023-08-30 04:18:49,771 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 04:18:49,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 1255 events. 540/1255 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8458 event pairs, 456 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 2291. Up to 982 conditions per place. [2023-08-30 04:18:49,777 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 66 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 04:18:49,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 313 flow [2023-08-30 04:18:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:18:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:18:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-30 04:18:49,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48833709556057187 [2023-08-30 04:18:49,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-30 04:18:49,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-30 04:18:49,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:18:49,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-30 04:18:49,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 04:18:49,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:49,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:49,787 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 143 flow. Second operand 3 states and 649 transitions. [2023-08-30 04:18:49,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 313 flow [2023-08-30 04:18:49,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 309 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 04:18:49,793 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 139 flow [2023-08-30 04:18:49,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-30 04:18:49,795 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-08-30 04:18:49,795 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 139 flow [2023-08-30 04:18:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:49,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:49,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:18:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:18:49,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:18:49,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 28186, now seen corresponding path program 1 times [2023-08-30 04:18:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:49,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655013330] [2023-08-30 04:18:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:49,938 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 04:18:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655013330] [2023-08-30 04:18:49,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655013330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:18:49,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:18:49,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:18:49,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700688274] [2023-08-30 04:18:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:18:49,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:18:49,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:18:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:18:50,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 443 [2023-08-30 04:18:50,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:50,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:50,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 443 [2023-08-30 04:18:50,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:50,217 INFO L130 PetriNetUnfolder]: 540/1209 cut-off events. [2023-08-30 04:18:50,218 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 04:18:50,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 1209 events. 540/1209 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8053 event pairs, 375 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2267. Up to 1021 conditions per place. [2023-08-30 04:18:50,224 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 67 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 04:18:50,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 317 flow [2023-08-30 04:18:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:18:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:18:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-30 04:18:50,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958615500376223 [2023-08-30 04:18:50,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-30 04:18:50,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-30 04:18:50,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:18:50,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-30 04:18:50,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 04:18:50,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:50,235 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 139 flow. Second operand 3 states and 659 transitions. [2023-08-30 04:18:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 317 flow [2023-08-30 04:18:50,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:18:50,238 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 145 flow [2023-08-30 04:18:50,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-08-30 04:18:50,239 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-08-30 04:18:50,239 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 145 flow [2023-08-30 04:18:50,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:50,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:50,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:18:50,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 04:18:50,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:18:50,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash 840389113, now seen corresponding path program 1 times [2023-08-30 04:18:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:50,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577523360] [2023-08-30 04:18:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:50,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:50,372 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 04:18:50,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577523360] [2023-08-30 04:18:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577523360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:18:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478141297] [2023-08-30 04:18:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:50,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:18:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:18:50,385 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 04:18:50,407 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 04:18:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:18:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:18:50,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2023-08-30 04:18:50,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 110 [2023-08-30 04:18:50,901 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 04:18:50,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:18:51,013 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 04:18:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478141297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:18:51,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:18:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-30 04:18:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392375154] [2023-08-30 04:18:51,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:18:51,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:18:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:18:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:18:51,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-30 04:18:51,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 145 flow. Second operand has 9 states, 9 states have (on average 194.66666666666666) internal successors, (1752), 9 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 04:18:51,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:51,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-30 04:18:51,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:51,514 INFO L130 PetriNetUnfolder]: 39/122 cut-off events. [2023-08-30 04:18:51,519 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 04:18:51,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 122 events. 39/122 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 507 event pairs, 5 based on Foata normal form. 20/119 useless extension candidates. Maximal degree in co-relation 241. Up to 78 conditions per place. [2023-08-30 04:18:51,520 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 41 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-30 04:18:51,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 199 flow [2023-08-30 04:18:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:18:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:18:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2023-08-30 04:18:51,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46106094808126413 [2023-08-30 04:18:51,524 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2023-08-30 04:18:51,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2023-08-30 04:18:51,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:18:51,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2023-08-30 04:18:51,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states 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 04:18:51,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states 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 04:18:51,532 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states 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 04:18:51,532 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 145 flow. Second operand 4 states and 817 transitions. [2023-08-30 04:18:51,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 199 flow [2023-08-30 04:18:51,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:18:51,534 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 71 flow [2023-08-30 04:18:51,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, 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=4, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 04:18:51,536 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -35 predicate places. [2023-08-30 04:18:51,537 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 71 flow [2023-08-30 04:18:51,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.66666666666666) internal successors, (1752), 9 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 04:18:51,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:51,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:18:51,553 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 04:18:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:18:51,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:18:51,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash 282236111, now seen corresponding path program 1 times [2023-08-30 04:18:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833695990] [2023-08-30 04:18:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:51,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:51,880 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 04:18:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:51,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833695990] [2023-08-30 04:18:51,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833695990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:18:51,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:18:51,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:18:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793240725] [2023-08-30 04:18:51,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:18:51,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:18:51,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:18:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:18:51,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 443 [2023-08-30 04:18:51,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 04:18:51,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:51,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 443 [2023-08-30 04:18:51,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:52,023 INFO L130 PetriNetUnfolder]: 35/107 cut-off events. [2023-08-30 04:18:52,023 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 04:18:52,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 107 events. 35/107 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 334 event pairs, 32 based on Foata normal form. 3/89 useless extension candidates. Maximal degree in co-relation 202. Up to 85 conditions per place. [2023-08-30 04:18:52,024 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 19 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 04:18:52,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 105 flow [2023-08-30 04:18:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:18:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:18:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-30 04:18:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507148231753198 [2023-08-30 04:18:52,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-30 04:18:52,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-30 04:18:52,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:18:52,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-30 04:18:52,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 04:18:52,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:52,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 04:18:52,033 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 71 flow. Second operand 3 states and 599 transitions. [2023-08-30 04:18:52,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 105 flow [2023-08-30 04:18:52,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:18:52,034 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 64 flow [2023-08-30 04:18:52,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 04:18:52,035 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -38 predicate places. [2023-08-30 04:18:52,035 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 64 flow [2023-08-30 04:18:52,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 04:18:52,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:52,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:18:52,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:18:52,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:18:52,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 282259427, now seen corresponding path program 1 times [2023-08-30 04:18:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:52,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14964627] [2023-08-30 04:18:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:18:52,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:18:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:18:52,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:18:52,081 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:18:52,082 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-08-30 04:18:52,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (37 of 39 remaining) [2023-08-30 04:18:52,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-30 04:18:52,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-30 04:18:52,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-30 04:18:52,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-08-30 04:18:52,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-30 04:18:52,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-08-30 04:18:52,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-30 04:18:52,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-30 04:18:52,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-30 04:18:52,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-30 04:18:52,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-30 04:18:52,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-30 04:18:52,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-30 04:18:52,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-30 04:18:52,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-08-30 04:18:52,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-30 04:18:52,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-30 04:18:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-30 04:18:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-30 04:18:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-30 04:18:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-30 04:18:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-30 04:18:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-30 04:18:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-30 04:18:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-30 04:18:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-08-30 04:18:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-30 04:18:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-08-30 04:18:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-30 04:18:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-30 04:18:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-30 04:18:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-30 04:18:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-30 04:18:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-30 04:18:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-30 04:18:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-30 04:18:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-08-30 04:18:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:18:52,091 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 04:18:52,093 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:18:52,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:18:52,118 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:18:52,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-30 04:18:52,173 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-30 04:18:52,173 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:18:52,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-30 04:18:52,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 298 transitions, 614 flow [2023-08-30 04:18:52,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 298 transitions, 614 flow [2023-08-30 04:18:52,186 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:18:52,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 298 transitions, 614 flow [2023-08-30 04:18:52,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 298 transitions, 614 flow [2023-08-30 04:18:52,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-30 04:18:52,236 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-30 04:18:52,236 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:18:52,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-30 04:18:52,263 INFO L119 LiptonReduction]: Number of co-enabled transitions 35376 [2023-08-30 04:18:59,568 INFO L134 LiptonReduction]: Checked pairs total: 89840 [2023-08-30 04:18:59,568 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-08-30 04:18:59,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:18:59,571 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;@1ce50f55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:18:59,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:18:59,573 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:18:59,573 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:18:59,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:59,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:18:59,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:18:59,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash 48029, now seen corresponding path program 1 times [2023-08-30 04:18:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:59,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964017662] [2023-08-30 04:18:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:59,597 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 04:18:59,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:59,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964017662] [2023-08-30 04:18:59,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964017662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:18:59,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:18:59,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:18:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584481392] [2023-08-30 04:18:59,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:18:59,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:18:59,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:59,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:18:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:18:59,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 563 [2023-08-30 04:18:59,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 04:18:59,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:59,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 563 [2023-08-30 04:18:59,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:03,077 INFO L130 PetriNetUnfolder]: 25719/42461 cut-off events. [2023-08-30 04:19:03,077 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2023-08-30 04:19:03,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80384 conditions, 42461 events. 25719/42461 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 372868 event pairs, 23485 based on Foata normal form. 3422/32162 useless extension candidates. Maximal degree in co-relation 32405. Up to 36488 conditions per place. [2023-08-30 04:19:03,462 INFO L137 encePairwiseOnDemand]: 521/563 looper letters, 112 selfloop transitions, 1 changer transitions 2/136 dead transitions. [2023-08-30 04:19:03,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 136 transitions, 520 flow [2023-08-30 04:19:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:19:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:19:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 929 transitions. [2023-08-30 04:19:03,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5500296033155714 [2023-08-30 04:19:03,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 929 transitions. [2023-08-30 04:19:03,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 929 transitions. [2023-08-30 04:19:03,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:03,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 929 transitions. [2023-08-30 04:19:03,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states 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 04:19:03,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 04:19:03,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 04:19:03,472 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 929 transitions. [2023-08-30 04:19:03,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 136 transitions, 520 flow [2023-08-30 04:19:03,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:19:03,479 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 213 flow [2023-08-30 04:19:03,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2023-08-30 04:19:03,480 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-30 04:19:03,480 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 213 flow [2023-08-30 04:19:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 04:19:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:03,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:19:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:19:03,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:03,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 48401, now seen corresponding path program 1 times [2023-08-30 04:19:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642493907] [2023-08-30 04:19:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:03,577 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 04:19:03,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642493907] [2023-08-30 04:19:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642493907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:03,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:03,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:19:03,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155741981] [2023-08-30 04:19:03,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:03,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:03,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:03,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:03,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 563 [2023-08-30 04:19:03,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states 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 04:19:03,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:03,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 563 [2023-08-30 04:19:03,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:05,943 INFO L130 PetriNetUnfolder]: 24516/40611 cut-off events. [2023-08-30 04:19:05,943 INFO L131 PetriNetUnfolder]: For 943/1111 co-relation queries the response was YES. [2023-08-30 04:19:06,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77969 conditions, 40611 events. 24516/40611 cut-off events. For 943/1111 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 356994 event pairs, 11305 based on Foata normal form. 0/28176 useless extension candidates. Maximal degree in co-relation 74838. Up to 36444 conditions per place. [2023-08-30 04:19:06,206 INFO L137 encePairwiseOnDemand]: 559/563 looper letters, 94 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-08-30 04:19:06,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 118 transitions, 451 flow [2023-08-30 04:19:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:19:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:19:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 851 transitions. [2023-08-30 04:19:06,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038484310242747 [2023-08-30 04:19:06,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 851 transitions. [2023-08-30 04:19:06,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 851 transitions. [2023-08-30 04:19:06,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:06,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 851 transitions. [2023-08-30 04:19:06,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states 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 04:19:06,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 04:19:06,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 04:19:06,215 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 213 flow. Second operand 3 states and 851 transitions. [2023-08-30 04:19:06,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 118 transitions, 451 flow [2023-08-30 04:19:06,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 118 transitions, 447 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 04:19:06,298 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 223 flow [2023-08-30 04:19:06,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-30 04:19:06,300 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -4 predicate places. [2023-08-30 04:19:06,300 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 223 flow [2023-08-30 04:19:06,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states 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 04:19:06,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:19:06,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:19:06,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:06,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:06,302 INFO L85 PathProgramCache]: Analyzing trace with hash 48399, now seen corresponding path program 1 times [2023-08-30 04:19:06,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:06,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844843259] [2023-08-30 04:19:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:06,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:06,370 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 04:19:06,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844843259] [2023-08-30 04:19:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844843259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:06,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:06,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:19:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625734517] [2023-08-30 04:19:06,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:06,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:06,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:06,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:06,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 563 [2023-08-30 04:19:06,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 04:19:06,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:06,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 563 [2023-08-30 04:19:06,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:08,766 INFO L130 PetriNetUnfolder]: 23188/38058 cut-off events. [2023-08-30 04:19:08,766 INFO L131 PetriNetUnfolder]: For 1003/1003 co-relation queries the response was YES. [2023-08-30 04:19:08,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73907 conditions, 38058 events. 23188/38058 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 1868. Compared 329511 event pairs, 20152 based on Foata normal form. 0/27121 useless extension candidates. Maximal degree in co-relation 73761. Up to 31306 conditions per place. [2023-08-30 04:19:08,982 INFO L137 encePairwiseOnDemand]: 559/563 looper letters, 109 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-30 04:19:08,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 519 flow [2023-08-30 04:19:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:19:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:19:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-08-30 04:19:08,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068087625814092 [2023-08-30 04:19:08,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-08-30 04:19:08,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-08-30 04:19:08,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:08,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-08-30 04:19:08,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 04:19:08,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 04:19:08,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 04:19:08,991 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 223 flow. Second operand 3 states and 856 transitions. [2023-08-30 04:19:08,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 519 flow [2023-08-30 04:19:08,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:19:08,995 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 221 flow [2023-08-30 04:19:08,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2023-08-30 04:19:08,997 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-30 04:19:08,998 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 221 flow [2023-08-30 04:19:08,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 04:19:08,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:08,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:19:08,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:19:08,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:08,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1786442796, now seen corresponding path program 1 times [2023-08-30 04:19:09,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:09,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113151018] [2023-08-30 04:19:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:09,129 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 04:19:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113151018] [2023-08-30 04:19:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113151018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:09,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:09,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:19:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82051912] [2023-08-30 04:19:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:09,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:19:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:19:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:19:09,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 563 [2023-08-30 04:19:09,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 04:19:09,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:09,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 563 [2023-08-30 04:19:09,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:10,708 INFO L130 PetriNetUnfolder]: 16971/28136 cut-off events. [2023-08-30 04:19:10,708 INFO L131 PetriNetUnfolder]: For 906/906 co-relation queries the response was YES. [2023-08-30 04:19:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54652 conditions, 28136 events. 16971/28136 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 236632 event pairs, 14626 based on Foata normal form. 2408/22446 useless extension candidates. Maximal degree in co-relation 49808. Up to 22837 conditions per place. [2023-08-30 04:19:11,053 INFO L137 encePairwiseOnDemand]: 555/563 looper letters, 97 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-30 04:19:11,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 121 transitions, 473 flow [2023-08-30 04:19:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:19:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:19:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1078 transitions. [2023-08-30 04:19:11,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786856127886323 [2023-08-30 04:19:11,057 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1078 transitions. [2023-08-30 04:19:11,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1078 transitions. [2023-08-30 04:19:11,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:11,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1078 transitions. [2023-08-30 04:19:11,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states 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 04:19:11,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 04:19:11,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 04:19:11,064 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 221 flow. Second operand 4 states and 1078 transitions. [2023-08-30 04:19:11,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 121 transitions, 473 flow [2023-08-30 04:19:11,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 121 transitions, 469 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:19:11,080 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 209 flow [2023-08-30 04:19:11,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-30 04:19:11,081 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -10 predicate places. [2023-08-30 04:19:11,081 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 209 flow [2023-08-30 04:19:11,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 04:19:11,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:11,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:19:11,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:19:11,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:11,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1786072937, now seen corresponding path program 1 times [2023-08-30 04:19:11,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:11,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880376810] [2023-08-30 04:19:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:11,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:11,208 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 04:19:11,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:11,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880376810] [2023-08-30 04:19:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880376810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:19:11,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480731611] [2023-08-30 04:19:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:11,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:19:11,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:19:11,217 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 04:19:11,247 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 04:19:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 04:19:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:19:11,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2023-08-30 04:19:11,489 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-30 04:19:11,585 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 04:19:11,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:19:11,628 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 04:19:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480731611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:19:11,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:19:11,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:19:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857253820] [2023-08-30 04:19:11,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:19:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:19:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:19:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:19:11,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 563 [2023-08-30 04:19:11,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 209 flow. Second operand has 8 states, 8 states have (on average 249.875) internal successors, (1999), 8 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states 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 04:19:11,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:11,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 563 [2023-08-30 04:19:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:13,566 INFO L130 PetriNetUnfolder]: 15685/26051 cut-off events. [2023-08-30 04:19:13,566 INFO L131 PetriNetUnfolder]: For 824/824 co-relation queries the response was YES. [2023-08-30 04:19:13,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51009 conditions, 26051 events. 15685/26051 cut-off events. For 824/824 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 219130 event pairs, 3363 based on Foata normal form. 18/19094 useless extension candidates. Maximal degree in co-relation 46165. Up to 20586 conditions per place. [2023-08-30 04:19:13,731 INFO L137 encePairwiseOnDemand]: 558/563 looper letters, 146 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2023-08-30 04:19:13,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 675 flow [2023-08-30 04:19:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:19:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:19:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1393 transitions. [2023-08-30 04:19:13,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49484902309058615 [2023-08-30 04:19:13,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1393 transitions. [2023-08-30 04:19:13,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1393 transitions. [2023-08-30 04:19:13,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:13,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1393 transitions. [2023-08-30 04:19:13,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 278.6) internal successors, (1393), 5 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states 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 04:19:13,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states 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 04:19:13,744 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states 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 04:19:13,744 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 209 flow. Second operand 5 states and 1393 transitions. [2023-08-30 04:19:13,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 675 flow [2023-08-30 04:19:13,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 672 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:19:13,762 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 214 flow [2023-08-30 04:19:13,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2023-08-30 04:19:13,763 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2023-08-30 04:19:13,763 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 214 flow [2023-08-30 04:19:13,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 249.875) internal successors, (1999), 8 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states 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 04:19:13,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:13,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:19:13,768 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 04:19:13,964 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,SelfDestructingSolverStorable10 [2023-08-30 04:19:13,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:13,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash -454855315, now seen corresponding path program 1 times [2023-08-30 04:19:13,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:13,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121039104] [2023-08-30 04:19:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:13,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:14,034 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 04:19:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121039104] [2023-08-30 04:19:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121039104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:19:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997570436] [2023-08-30 04:19:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:14,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:19:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:19:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:19:14,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 563 [2023-08-30 04:19:14,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states 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 04:19:14,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:14,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 563 [2023-08-30 04:19:14,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:15,197 INFO L130 PetriNetUnfolder]: 11995/19693 cut-off events. [2023-08-30 04:19:15,197 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-30 04:19:15,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39989 conditions, 19693 events. 11995/19693 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 149603 event pairs, 9556 based on Foata normal form. 0/16186 useless extension candidates. Maximal degree in co-relation 18156. Up to 14533 conditions per place. [2023-08-30 04:19:15,331 INFO L137 encePairwiseOnDemand]: 539/563 looper letters, 110 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2023-08-30 04:19:15,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 142 transitions, 573 flow [2023-08-30 04:19:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:19:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:19:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2023-08-30 04:19:15,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46847246891651867 [2023-08-30 04:19:15,335 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2023-08-30 04:19:15,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2023-08-30 04:19:15,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:15,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2023-08-30 04:19:15,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:19:15,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 04:19:15,342 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 04:19:15,342 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 214 flow. Second operand 4 states and 1055 transitions. [2023-08-30 04:19:15,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 142 transitions, 573 flow [2023-08-30 04:19:15,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 565 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:19:15,351 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 350 flow [2023-08-30 04:19:15,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-08-30 04:19:15,352 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-30 04:19:15,352 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 350 flow [2023-08-30 04:19:15,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states 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 04:19:15,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:15,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:19:15,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:19:15,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:15,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash -454855161, now seen corresponding path program 1 times [2023-08-30 04:19:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335129501] [2023-08-30 04:19:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:15,459 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 04:19:15,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:15,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335129501] [2023-08-30 04:19:15,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335129501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:15,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:15,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:19:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861490243] [2023-08-30 04:19:15,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:15,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:19:15,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:19:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:19:15,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 563 [2023-08-30 04:19:15,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 04:19:15,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:15,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 563 [2023-08-30 04:19:15,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:17,350 INFO L130 PetriNetUnfolder]: 14540/24852 cut-off events. [2023-08-30 04:19:17,351 INFO L131 PetriNetUnfolder]: For 6631/6752 co-relation queries the response was YES. [2023-08-30 04:19:17,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57936 conditions, 24852 events. 14540/24852 cut-off events. For 6631/6752 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 206687 event pairs, 4525 based on Foata normal form. 0/21501 useless extension candidates. Maximal degree in co-relation 48578. Up to 14517 conditions per place. [2023-08-30 04:19:17,531 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 163 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2023-08-30 04:19:17,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 206 transitions, 1068 flow [2023-08-30 04:19:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:19:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:19:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2023-08-30 04:19:17,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066607460035524 [2023-08-30 04:19:17,535 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2023-08-30 04:19:17,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2023-08-30 04:19:17,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:17,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2023-08-30 04:19:17,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states 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 04:19:17,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 04:19:17,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states 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 04:19:17,543 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 350 flow. Second operand 4 states and 1141 transitions. [2023-08-30 04:19:17,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 206 transitions, 1068 flow [2023-08-30 04:19:17,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 206 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:19:17,574 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 554 flow [2023-08-30 04:19:17,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2023-08-30 04:19:17,576 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 0 predicate places. [2023-08-30 04:19:17,576 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 554 flow [2023-08-30 04:19:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 04:19:17,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:17,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:19:17,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:19:17,577 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:19:17,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1677468030, now seen corresponding path program 1 times [2023-08-30 04:19:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:17,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684183777] [2023-08-30 04:19:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:19:17,610 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:19:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:19:17,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:19:17,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:19:17,632 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:19:17,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (48 of 50 remaining) [2023-08-30 04:19:17,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:19:17,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:19:17,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:19:17,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-08-30 04:19:17,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:19:17,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-08-30 04:19:17,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:19:17,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:19:17,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:19:17,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:19:17,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:19:17,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:19:17,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:19:17,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:19:17,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2023-08-30 04:19:17,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:19:17,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-08-30 04:19:17,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:19:17,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:19:17,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:19:17,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-08-30 04:19:17,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:19:17,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:19:17,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:19:17,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:19:17,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:19:17,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:19:17,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:19:17,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:19:17,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:19:17,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:19:17,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:19:17,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:19:17,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:19:17,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:19:17,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:19:17,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:19:17,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:19:17,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:19:17,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:19:17,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:19:17,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:19:17,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:19:17,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:19:17,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:19:17,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:19:17,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:19:17,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:19:17,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:19:17,643 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:19:17,644 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:19:17,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:19:17,686 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:19:17,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-30 04:19:17,807 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-30 04:19:17,807 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:19:17,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-30 04:19:17,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 367 transitions, 764 flow [2023-08-30 04:19:17,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 367 transitions, 764 flow [2023-08-30 04:19:17,832 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:19:17,832 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 319 places, 367 transitions, 764 flow [2023-08-30 04:19:17,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 319 places, 367 transitions, 764 flow [2023-08-30 04:19:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-30 04:19:17,940 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-30 04:19:17,941 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:19:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-30 04:19:17,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 67134 [2023-08-30 04:19:25,984 INFO L134 LiptonReduction]: Checked pairs total: 180157 [2023-08-30 04:19:25,984 INFO L136 LiptonReduction]: Total number of compositions: 322 [2023-08-30 04:19:25,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:19:25,986 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;@1ce50f55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:19:25,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:19:25,989 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:19:25,989 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:19:25,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:25,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:19:25,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:19:25,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash 72659, now seen corresponding path program 1 times [2023-08-30 04:19:25,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:25,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863870671] [2023-08-30 04:19:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:26,025 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 04:19:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:26,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863870671] [2023-08-30 04:19:26,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863870671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:26,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:26,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:19:26,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037072669] [2023-08-30 04:19:26,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:26,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:26,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:26,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 689 [2023-08-30 04:19:26,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states 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 04:19:26,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:26,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 689 [2023-08-30 04:19:26,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:20:39,861 INFO L130 PetriNetUnfolder]: 765927/1099964 cut-off events. [2023-08-30 04:20:39,862 INFO L131 PetriNetUnfolder]: For 6279/6279 co-relation queries the response was YES. [2023-08-30 04:20:41,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111684 conditions, 1099964 events. 765927/1099964 cut-off events. For 6279/6279 co-relation queries the response was YES. Maximal size of possible extension queue 35459. Compared 10637244 event pairs, 680865 based on Foata normal form. 94320/843495 useless extension candidates. Maximal degree in co-relation 162399. Up to 928585 conditions per place. [2023-08-30 04:20:46,696 INFO L137 encePairwiseOnDemand]: 634/689 looper letters, 153 selfloop transitions, 2 changer transitions 0/182 dead transitions. [2023-08-30 04:20:46,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 182 transitions, 704 flow [2023-08-30 04:20:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:20:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:20:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1153 transitions. [2023-08-30 04:20:46,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578132559264635 [2023-08-30 04:20:46,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1153 transitions. [2023-08-30 04:20:46,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1153 transitions. [2023-08-30 04:20:46,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:20:46,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1153 transitions. [2023-08-30 04:20:46,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states 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 04:20:46,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 04:20:46,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 04:20:46,706 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1153 transitions. [2023-08-30 04:20:46,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 182 transitions, 704 flow [2023-08-30 04:20:46,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:20:46,720 INFO L231 Difference]: Finished difference. Result has 123 places, 122 transitions, 278 flow [2023-08-30 04:20:46,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2023-08-30 04:20:46,721 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -10 predicate places. [2023-08-30 04:20:46,721 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 278 flow [2023-08-30 04:20:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states 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 04:20:46,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:20:46,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:20:46,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:20:46,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:20:46,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:20:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 72657, now seen corresponding path program 1 times [2023-08-30 04:20:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:20:46,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260044041] [2023-08-30 04:20:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:20:46,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:20:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:20:46,783 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 04:20:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:20:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260044041] [2023-08-30 04:20:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260044041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:20:46,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:20:46,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:20:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830926721] [2023-08-30 04:20:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:20:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:20:46,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:20:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:20:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:20:46,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 689 [2023-08-30 04:20:46,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 04:20:46,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:20:46,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 689 [2023-08-30 04:20:46,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:21:56,499 INFO L130 PetriNetUnfolder]: 766632/1096090 cut-off events. [2023-08-30 04:21:56,499 INFO L131 PetriNetUnfolder]: For 15590/15590 co-relation queries the response was YES. [2023-08-30 04:21:59,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2118550 conditions, 1096090 events. 766632/1096090 cut-off events. For 15590/15590 co-relation queries the response was YES. Maximal size of possible extension queue 34701. Compared 10449039 event pairs, 485957 based on Foata normal form. 0/754981 useless extension candidates. Maximal degree in co-relation 1941797. Up to 1007748 conditions per place. [2023-08-30 04:22:03,560 INFO L137 encePairwiseOnDemand]: 685/689 looper letters, 115 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2023-08-30 04:22:03,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 144 transitions, 556 flow [2023-08-30 04:22:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:22:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:22:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1037 transitions. [2023-08-30 04:22:03,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501693275278181 [2023-08-30 04:22:03,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1037 transitions. [2023-08-30 04:22:03,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1037 transitions. [2023-08-30 04:22:03,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:22:03,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1037 transitions. [2023-08-30 04:22:03,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states 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 04:22:03,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 04:22:03,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 04:22:03,569 INFO L175 Difference]: Start difference. First operand has 123 places, 122 transitions, 278 flow. Second operand 3 states and 1037 transitions. [2023-08-30 04:22:03,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 144 transitions, 556 flow [2023-08-30 04:22:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 552 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:22:11,452 INFO L231 Difference]: Finished difference. Result has 124 places, 123 transitions, 288 flow [2023-08-30 04:22:11,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=124, PETRI_TRANSITIONS=123} [2023-08-30 04:22:11,452 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -9 predicate places. [2023-08-30 04:22:11,453 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 123 transitions, 288 flow [2023-08-30 04:22:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 04:22:11,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:22:11,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:22:11,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:22:11,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:22:11,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:22:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash 72159, now seen corresponding path program 1 times [2023-08-30 04:22:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:22:11,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847329946] [2023-08-30 04:22:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:22:11,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:22:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:22:11,468 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 04:22:11,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:22:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847329946] [2023-08-30 04:22:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847329946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:22:11,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:22:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:22:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296178711] [2023-08-30 04:22:11,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:22:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:22:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:22:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:22:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:22:11,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 689 [2023-08-30 04:22:11,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 123 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states 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 04:22:11,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:22:11,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 689 [2023-08-30 04:22:11,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:23:27,272 INFO L130 PetriNetUnfolder]: 801482/1134851 cut-off events. [2023-08-30 04:23:27,272 INFO L131 PetriNetUnfolder]: For 25497/25497 co-relation queries the response was YES. [2023-08-30 04:23:29,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2215347 conditions, 1134851 events. 801482/1134851 cut-off events. For 25497/25497 co-relation queries the response was YES. Maximal size of possible extension queue 35575. Compared 10648558 event pairs, 738817 based on Foata normal form. 0/772124 useless extension candidates. Maximal degree in co-relation 2215196. Up to 1007770 conditions per place. [2023-08-30 04:23:34,403 INFO L137 encePairwiseOnDemand]: 686/689 looper letters, 155 selfloop transitions, 1 changer transitions 2/184 dead transitions. [2023-08-30 04:23:34,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 726 flow [2023-08-30 04:23:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:23:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:23:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1073 transitions. [2023-08-30 04:23:34,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191098209966134 [2023-08-30 04:23:34,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1073 transitions. [2023-08-30 04:23:34,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1073 transitions. [2023-08-30 04:23:34,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:23:34,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1073 transitions. [2023-08-30 04:23:34,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states 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 04:23:34,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 04:23:34,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 689.0) internal successors, (2756), 4 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states 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 04:23:34,413 INFO L175 Difference]: Start difference. First operand has 124 places, 123 transitions, 288 flow. Second operand 3 states and 1073 transitions. [2023-08-30 04:23:34,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 726 flow [2023-08-30 04:23:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:23:34,435 INFO L231 Difference]: Finished difference. Result has 126 places, 122 transitions, 289 flow [2023-08-30 04:23:34,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2023-08-30 04:23:34,436 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-08-30 04:23:34,436 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 289 flow [2023-08-30 04:23:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states 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 04:23:34,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:23:34,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:23:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:23:34,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:23:34,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:23:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1559102587, now seen corresponding path program 1 times [2023-08-30 04:23:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:23:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007667956] [2023-08-30 04:23:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:23:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:23:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:23:34,520 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 04:23:34,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:23:34,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007667956] [2023-08-30 04:23:34,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007667956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:23:34,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:23:34,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:23:34,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392143026] [2023-08-30 04:23:34,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:23:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:23:34,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:23:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:23:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:23:34,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 689 [2023-08-30 04:23:34,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 04:23:34,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:23:34,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 689 [2023-08-30 04:23:34,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:24:18,824 INFO L130 PetriNetUnfolder]: 487709/702474 cut-off events. [2023-08-30 04:24:18,824 INFO L131 PetriNetUnfolder]: For 23667/23667 co-relation queries the response was YES. [2023-08-30 04:24:20,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373890 conditions, 702474 events. 487709/702474 cut-off events. For 23667/23667 co-relation queries the response was YES. Maximal size of possible extension queue 22079. Compared 6532335 event pairs, 428127 based on Foata normal form. 45453/540894 useless extension candidates. Maximal degree in co-relation 1316650. Up to 585902 conditions per place. [2023-08-30 04:24:23,190 INFO L137 encePairwiseOnDemand]: 678/689 looper letters, 135 selfloop transitions, 2 changer transitions 0/164 dead transitions. [2023-08-30 04:24:23,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 164 transitions, 647 flow [2023-08-30 04:24:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:24:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:24:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1322 transitions. [2023-08-30 04:24:23,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796806966618287 [2023-08-30 04:24:23,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1322 transitions. [2023-08-30 04:24:23,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1322 transitions. [2023-08-30 04:24:23,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:24:23,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1322 transitions. [2023-08-30 04:24:23,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 330.5) internal successors, (1322), 4 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states 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 04:24:23,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 689.0) internal successors, (3445), 5 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states 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 04:24:23,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 689.0) internal successors, (3445), 5 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states 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 04:24:23,200 INFO L175 Difference]: Start difference. First operand has 126 places, 122 transitions, 289 flow. Second operand 4 states and 1322 transitions. [2023-08-30 04:24:23,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 164 transitions, 647 flow [2023-08-30 04:25:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 643 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 04:25:47,310 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 271 flow [2023-08-30 04:25:47,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2023-08-30 04:25:47,311 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -15 predicate places. [2023-08-30 04:25:47,311 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 271 flow [2023-08-30 04:25:47,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 04:25:47,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:25:47,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:25:47,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:25:47,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:25:47,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:25:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1559502966, now seen corresponding path program 1 times [2023-08-30 04:25:47,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:25:47,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288738858] [2023-08-30 04:25:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:25:47,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:25:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:25:47,420 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 04:25:47,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:25:47,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288738858] [2023-08-30 04:25:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288738858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:25:47,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997087559] [2023-08-30 04:25:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:25:47,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:25:47,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:25:47,429 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 04:25:47,448 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 04:25:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:25:47,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:25:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:25:47,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2023-08-30 04:25:47,609 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 106 [2023-08-30 04:25:47,674 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 04:25:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:25:47,759 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 04:25:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997087559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:25:47,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:25:47,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-30 04:25:47,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891113865] [2023-08-30 04:25:47,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:25:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:25:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:25:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:25:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:25:48,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 689 [2023-08-30 04:25:48,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 271 flow. Second operand has 9 states, 9 states have (on average 304.6666666666667) internal successors, (2742), 9 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states 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 04:25:48,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:25:48,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 689 [2023-08-30 04:25:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:26:31,189 INFO L130 PetriNetUnfolder]: 467670/673670 cut-off events. [2023-08-30 04:26:31,190 INFO L131 PetriNetUnfolder]: For 19328/19328 co-relation queries the response was YES. [2023-08-30 04:26:33,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315126 conditions, 673670 events. 467670/673670 cut-off events. For 19328/19328 co-relation queries the response was YES. Maximal size of possible extension queue 21444. Compared 6243012 event pairs, 206606 based on Foata normal form. 18/489802 useless extension candidates. Maximal degree in co-relation 1193811. Up to 561190 conditions per place. [2023-08-30 04:26:36,963 INFO L137 encePairwiseOnDemand]: 684/689 looper letters, 187 selfloop transitions, 4 changer transitions 0/218 dead transitions. [2023-08-30 04:26:36,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 218 transitions, 863 flow [2023-08-30 04:26:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:26:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:26:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1709 transitions. [2023-08-30 04:26:36,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960812772133527 [2023-08-30 04:26:36,966 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1709 transitions. [2023-08-30 04:26:36,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1709 transitions. [2023-08-30 04:26:36,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:26:36,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1709 transitions. [2023-08-30 04:26:36,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 341.8) internal successors, (1709), 5 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states 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 04:26:36,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 689.0) internal successors, (4134), 6 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states 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 04:26:36,974 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 689.0) internal successors, (4134), 6 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states 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 04:26:36,974 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 271 flow. Second operand 5 states and 1709 transitions. [2023-08-30 04:26:36,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 218 transitions, 863 flow [2023-08-30 04:26:47,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 218 transitions, 860 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:26:47,401 INFO L231 Difference]: Finished difference. Result has 120 places, 113 transitions, 282 flow [2023-08-30 04:26:47,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=120, PETRI_TRANSITIONS=113} [2023-08-30 04:26:47,401 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-08-30 04:26:47,401 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 282 flow [2023-08-30 04:26:47,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 304.6666666666667) internal successors, (2742), 9 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states 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 04:26:47,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:26:47,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:26:47,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:26:47,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:26:47,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:26:47,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:26:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1087542809, now seen corresponding path program 1 times [2023-08-30 04:26:47,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:26:47,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766232143] [2023-08-30 04:26:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:26:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:26:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:26:47,677 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 04:26:47,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:26:47,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766232143] [2023-08-30 04:26:47,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766232143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:26:47,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:26:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:26:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794217520] [2023-08-30 04:26:47,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:26:47,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:26:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:26:47,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:26:47,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:26:47,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 689 [2023-08-30 04:26:47,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states 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 04:26:47,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:26:47,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 689 [2023-08-30 04:26:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:27:17,221 INFO L130 PetriNetUnfolder]: 341728/484755 cut-off events. [2023-08-30 04:27:17,221 INFO L131 PetriNetUnfolder]: For 27893/27893 co-relation queries the response was YES. [2023-08-30 04:27:18,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983835 conditions, 484755 events. 341728/484755 cut-off events. For 27893/27893 co-relation queries the response was YES. Maximal size of possible extension queue 13558. Compared 4086387 event pairs, 260140 based on Foata normal form. 0/400100 useless extension candidates. Maximal degree in co-relation 310424. Up to 345874 conditions per place. [2023-08-30 04:27:20,184 INFO L137 encePairwiseOnDemand]: 654/689 looper letters, 160 selfloop transitions, 20 changer transitions 0/200 dead transitions. [2023-08-30 04:27:20,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 817 flow [2023-08-30 04:27:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:27:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:27:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1300 transitions. [2023-08-30 04:27:20,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2023-08-30 04:27:20,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1300 transitions. [2023-08-30 04:27:20,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1300 transitions. [2023-08-30 04:27:20,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:27:20,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1300 transitions. [2023-08-30 04:27:20,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states 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 04:27:20,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 689.0) internal successors, (3445), 5 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states 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 04:27:20,192 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 689.0) internal successors, (3445), 5 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states 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 04:27:20,192 INFO L175 Difference]: Start difference. First operand has 120 places, 113 transitions, 282 flow. Second operand 4 states and 1300 transitions. [2023-08-30 04:27:20,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 817 flow [2023-08-30 04:27:20,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 200 transitions, 809 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:27:20,834 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 486 flow [2023-08-30 04:27:20,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2023-08-30 04:27:20,835 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -10 predicate places. [2023-08-30 04:27:20,835 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 486 flow [2023-08-30 04:27:20,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states 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 04:27:20,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:27:20,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:27:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 04:27:20,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:27:20,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:27:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1087542456, now seen corresponding path program 1 times [2023-08-30 04:27:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:27:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331399110] [2023-08-30 04:27:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:27:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:27:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:27:20,928 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 04:27:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:27:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331399110] [2023-08-30 04:27:20,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331399110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:27:20,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:27:20,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:27:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667667502] [2023-08-30 04:27:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:27:20,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:27:20,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:27:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:27:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:27:21,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 689 [2023-08-30 04:27:21,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 298.75) internal successors, (1195), 4 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states 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 04:27:21,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:27:21,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 689 [2023-08-30 04:27:21,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:28:08,144 INFO L130 PetriNetUnfolder]: 447827/652657 cut-off events. [2023-08-30 04:28:08,144 INFO L131 PetriNetUnfolder]: For 176309/183401 co-relation queries the response was YES. [2023-08-30 04:28:09,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553539 conditions, 652657 events. 447827/652657 cut-off events. For 176309/183401 co-relation queries the response was YES. Maximal size of possible extension queue 21166. Compared 6063194 event pairs, 121257 based on Foata normal form. 194/566664 useless extension candidates. Maximal degree in co-relation 1226600. Up to 395222 conditions per place. [2023-08-30 04:28:12,487 INFO L137 encePairwiseOnDemand]: 672/689 looper letters, 218 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2023-08-30 04:28:12,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 274 transitions, 1466 flow [2023-08-30 04:28:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:28:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:28:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1405 transitions. [2023-08-30 04:28:12,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097968069666183 [2023-08-30 04:28:12,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1405 transitions. [2023-08-30 04:28:12,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1405 transitions. [2023-08-30 04:28:12,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:28:12,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1405 transitions. [2023-08-30 04:28:12,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.25) internal successors, (1405), 4 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 04:28:12,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 689.0) internal successors, (3445), 5 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states 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 04:28:12,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 689.0) internal successors, (3445), 5 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states 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 04:28:12,495 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 486 flow. Second operand 4 states and 1405 transitions. [2023-08-30 04:28:12,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 274 transitions, 1466 flow [2023-08-30 04:28:22,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 274 transitions, 1462 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:28:22,721 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 770 flow [2023-08-30 04:28:22,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=770, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2023-08-30 04:28:22,722 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -5 predicate places. [2023-08-30 04:28:22,722 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 770 flow [2023-08-30 04:28:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.75) internal successors, (1195), 4 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states 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 04:28:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:28:22,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:28:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 04:28:22,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:28:22,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:28:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1582669055, now seen corresponding path program 1 times [2023-08-30 04:28:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:28:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262125572] [2023-08-30 04:28:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:28:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:28:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:28:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:28:22,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:28:22,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262125572] [2023-08-30 04:28:22,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262125572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:28:22,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201968683] [2023-08-30 04:28:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:28:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:28:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:28:22,795 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 04:28:22,818 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 04:28:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:28:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:28:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:28:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:28:22,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:28:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:28:22,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201968683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:28:22,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:28:22,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 04:28:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754883588] [2023-08-30 04:28:22,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:28:22,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:28:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:28:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:28:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:28:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 689 [2023-08-30 04:28:23,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 770 flow. Second operand has 8 states, 8 states have (on average 308.25) internal successors, (2466), 8 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 04:28:23,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:28:23,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 689 [2023-08-30 04:28:23,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:28:26,780 INFO L130 PetriNetUnfolder]: 35346/54662 cut-off events. [2023-08-30 04:28:26,781 INFO L131 PetriNetUnfolder]: For 65831/66422 co-relation queries the response was YES. [2023-08-30 04:28:26,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160512 conditions, 54662 events. 35346/54662 cut-off events. For 65831/66422 co-relation queries the response was YES. Maximal size of possible extension queue 2277. Compared 435908 event pairs, 3230 based on Foata normal form. 4984/56821 useless extension candidates. Maximal degree in co-relation 160499. Up to 35059 conditions per place. [2023-08-30 04:28:27,130 INFO L137 encePairwiseOnDemand]: 686/689 looper letters, 161 selfloop transitions, 4 changer transitions 0/180 dead transitions. [2023-08-30 04:28:27,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 180 transitions, 1112 flow [2023-08-30 04:28:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:28:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:28:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1971 transitions. [2023-08-30 04:28:27,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47677793904209 [2023-08-30 04:28:27,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1971 transitions. [2023-08-30 04:28:27,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1971 transitions. [2023-08-30 04:28:27,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:28:27,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1971 transitions. [2023-08-30 04:28:27,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.5) internal successors, (1971), 6 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states 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 04:28:27,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 689.0) internal successors, (4823), 7 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states 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 04:28:27,140 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 689.0) internal successors, (4823), 7 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states 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 04:28:27,140 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 770 flow. Second operand 6 states and 1971 transitions. [2023-08-30 04:28:27,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 180 transitions, 1112 flow [2023-08-30 04:28:27,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 180 transitions, 1104 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 04:28:27,169 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 338 flow [2023-08-30 04:28:27,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=689, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-08-30 04:28:27,170 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -50 predicate places. [2023-08-30 04:28:27,170 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 338 flow [2023-08-30 04:28:27,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 308.25) internal successors, (2466), 8 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states 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 04:28:27,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:28:27,170 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:28:27,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 04:28:27,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:28:27,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:28:27,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:28:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1523860574, now seen corresponding path program 1 times [2023-08-30 04:28:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:28:27,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145505394] [2023-08-30 04:28:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:28:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:28:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:28:27,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:28:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:28:27,416 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:28:27,417 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:28:27,417 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (60 of 61 remaining) [2023-08-30 04:28:27,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (59 of 61 remaining) [2023-08-30 04:28:27,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 61 remaining) [2023-08-30 04:28:27,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 61 remaining) [2023-08-30 04:28:27,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 61 remaining) [2023-08-30 04:28:27,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 61 remaining) [2023-08-30 04:28:27,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 61 remaining) [2023-08-30 04:28:27,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 61 remaining) [2023-08-30 04:28:27,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 61 remaining) [2023-08-30 04:28:27,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 61 remaining) [2023-08-30 04:28:27,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (44 of 61 remaining) [2023-08-30 04:28:27,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 61 remaining) [2023-08-30 04:28:27,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 61 remaining) [2023-08-30 04:28:27,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 61 remaining) [2023-08-30 04:28:27,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 61 remaining) [2023-08-30 04:28:27,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 61 remaining) [2023-08-30 04:28:27,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (33 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 61 remaining) [2023-08-30 04:28:27,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 61 remaining) [2023-08-30 04:28:27,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 61 remaining) [2023-08-30 04:28:27,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 61 remaining) [2023-08-30 04:28:27,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 61 remaining) [2023-08-30 04:28:27,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 61 remaining) [2023-08-30 04:28:27,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 61 remaining) [2023-08-30 04:28:27,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 61 remaining) [2023-08-30 04:28:27,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 61 remaining) [2023-08-30 04:28:27,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 61 remaining) [2023-08-30 04:28:27,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 61 remaining) [2023-08-30 04:28:27,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 61 remaining) [2023-08-30 04:28:27,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 61 remaining) [2023-08-30 04:28:27,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 61 remaining) [2023-08-30 04:28:27,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 61 remaining) [2023-08-30 04:28:27,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 04:28:27,426 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:28:27,427 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:28:27,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:28:27,456 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:28:27,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 436 transitions, 916 flow [2023-08-30 04:28:27,621 INFO L130 PetriNetUnfolder]: 152/1037 cut-off events. [2023-08-30 04:28:27,621 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:28:27,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 1037 events. 152/1037 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5366 event pairs, 6 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 747. Up to 32 conditions per place. [2023-08-30 04:28:27,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 436 transitions, 916 flow [2023-08-30 04:28:27,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 436 transitions, 916 flow [2023-08-30 04:28:27,664 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:28:27,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 436 transitions, 916 flow [2023-08-30 04:28:27,664 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 436 transitions, 916 flow [2023-08-30 04:28:27,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 436 transitions, 916 flow [2023-08-30 04:28:27,820 INFO L130 PetriNetUnfolder]: 152/1037 cut-off events. [2023-08-30 04:28:27,820 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:28:27,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 1037 events. 152/1037 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5366 event pairs, 6 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 747. Up to 32 conditions per place. [2023-08-30 04:28:27,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 108272 [2023-08-30 04:28:37,691 INFO L134 LiptonReduction]: Checked pairs total: 328303 [2023-08-30 04:28:37,691 INFO L136 LiptonReduction]: Total number of compositions: 388 [2023-08-30 04:28:37,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:28:37,693 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;@1ce50f55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:28:37,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-08-30 04:28:37,695 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:28:37,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:28:37,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:28:37,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:28:37,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-30 04:28:37,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:28:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash 100507, now seen corresponding path program 1 times [2023-08-30 04:28:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:28:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150633495] [2023-08-30 04:28:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:28:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:28:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:28:37,711 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 04:28:37,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:28:37,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150633495] [2023-08-30 04:28:37,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150633495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:28:37,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:28:37,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:28:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23510989] [2023-08-30 04:28:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:28:37,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:28:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:28:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:28:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:28:37,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 824 [2023-08-30 04:28:37,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 218 transitions, 480 flow. Second operand has 3 states, 3 states have (on average 360.6666666666667) internal successors, (1082), 3 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states 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 04:28:37,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:28:37,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 824 [2023-08-30 04:28:37,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15