./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:42:52,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:42:52,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:42:52,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:42:52,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:42:52,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:42:52,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:42:52,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:42:52,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:42:52,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:42:52,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:42:52,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:42:52,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:42:52,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:42:52,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:42:52,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:42:52,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:42:52,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:42:52,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:42:52,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:42:52,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:42:52,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:42:52,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:42:52,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:42:52,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:42:52,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:42:52,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:42:52,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:42:52,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:42:52,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:42:52,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:42:52,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:42:52,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:42:52,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:42:52,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:42:52,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:42:52,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:42:52,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:42:52,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:42:52,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:42:52,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:42:52,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:42:52,310 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:42:52,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:42:52,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:42:52,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:42:52,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:42:52,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:42:52,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:42:52,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:42:52,313 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:42:52,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:42:52,314 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:42:52,314 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:42:52,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:42:52,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:42:52,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:42:52,315 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:42:52,315 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:42:52,315 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:42:52,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:42:52,316 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:42:52,316 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:42:52,316 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:42:52,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:42:52,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:42:52,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:42:52,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:42:52,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:42:52,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:42:52,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:42:52,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:42:52,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:42:52,318 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:42:52,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:42:52,319 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:42:52,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:42:52,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:42:52,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:42:52,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:42:52,659 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:42:52,659 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:42:52,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-08-29 21:42:53,851 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:42:54,087 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:42:54,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-08-29 21:42:54,099 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21e77e15/f9608728be894cf6a869f09b8e64d2f8/FLAGc91a932d5 [2023-08-29 21:42:54,110 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21e77e15/f9608728be894cf6a869f09b8e64d2f8 [2023-08-29 21:42:54,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:42:54,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:42:54,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:42:54,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:42:54,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:42:54,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446d5da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54, skipping insertion in model container [2023-08-29 21:42:54,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:42:54,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:42:54,370 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_24-sound_lock_racing.i[30176,30189] [2023-08-29 21:42:54,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:42:54,395 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:42:54,422 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_24-sound_lock_racing.i[30176,30189] [2023-08-29 21:42:54,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:42:54,467 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:42:54,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54 WrapperNode [2023-08-29 21:42:54,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:42:54,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:42:54,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:42:54,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:42:54,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,502 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-29 21:42:54,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:42:54,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:42:54,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:42:54,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:42:54,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:42:54,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:42:54,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:42:54,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:42:54,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (1/1) ... [2023-08-29 21:42:54,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:42:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:54,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:42:54,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:42:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:42:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:42:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:42:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:42:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:42:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:42:54,603 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:42:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:42:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:42:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:42:54,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:42:54,605 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:42:54,742 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:42:54,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:42:54,986 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:42:54,994 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:42:54,994 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:42:54,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:42:54 BoogieIcfgContainer [2023-08-29 21:42:54,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:42:54,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:42:54,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:42:55,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:42:55,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:42:54" (1/3) ... [2023-08-29 21:42:55,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655c94a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:42:55, skipping insertion in model container [2023-08-29 21:42:55,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:42:54" (2/3) ... [2023-08-29 21:42:55,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655c94a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:42:55, skipping insertion in model container [2023-08-29 21:42:55,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:42:54" (3/3) ... [2023-08-29 21:42:55,003 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-08-29 21:42:55,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:42:55,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:42:55,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:42:55,074 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:42:55,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 122 transitions, 252 flow [2023-08-29 21:42:55,159 INFO L130 PetriNetUnfolder]: 18/162 cut-off events. [2023-08-29 21:42:55,159 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:42:55,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 162 events. 18/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 380 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-08-29 21:42:55,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 122 transitions, 252 flow [2023-08-29 21:42:55,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 122 transitions, 252 flow [2023-08-29 21:42:55,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:55,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 122 transitions, 252 flow [2023-08-29 21:42:55,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 122 transitions, 252 flow [2023-08-29 21:42:55,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 122 transitions, 252 flow [2023-08-29 21:42:55,235 INFO L130 PetriNetUnfolder]: 18/162 cut-off events. [2023-08-29 21:42:55,235 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:42:55,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 162 events. 18/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 380 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-08-29 21:42:55,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-08-29 21:42:59,021 INFO L134 LiptonReduction]: Checked pairs total: 4894 [2023-08-29 21:42:59,022 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-29 21:42:59,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:59,040 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:59,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:42:59,043 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:42:59,043 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:59,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:59,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:59,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:42:59,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash 14993, now seen corresponding path program 1 times [2023-08-29 21:42:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:59,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056218697] [2023-08-29 21:42:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:59,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056218697] [2023-08-29 21:42:59,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056218697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:59,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:59,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:59,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357132721] [2023-08-29 21:42:59,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:59,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:59,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 231 [2023-08-29 21:42:59,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:59,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 231 [2023-08-29 21:42:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:59,503 INFO L130 PetriNetUnfolder]: 105/249 cut-off events. [2023-08-29 21:42:59,503 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:42:59,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 249 events. 105/249 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 987 event pairs, 88 based on Foata normal form. 14/202 useless extension candidates. Maximal degree in co-relation 459. Up to 209 conditions per place. [2023-08-29 21:42:59,508 INFO L137 encePairwiseOnDemand]: 218/231 looper letters, 30 selfloop transitions, 2 changer transitions 2/35 dead transitions. [2023-08-29 21:42:59,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 144 flow [2023-08-29 21:42:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-29 21:42:59,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036075036075036 [2023-08-29 21:42:59,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-29 21:42:59,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-29 21:42:59,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:59,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-29 21:42:59,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,540 INFO L175 Difference]: Start difference. First operand has 31 places, 37 transitions, 82 flow. Second operand 3 states and 349 transitions. [2023-08-29 21:42:59,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 144 flow [2023-08-29 21:42:59,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:59,544 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 60 flow [2023-08-29 21:42:59,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-08-29 21:42:59,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-29 21:42:59,549 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 60 flow [2023-08-29 21:42:59,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:59,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:59,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:42:59,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:42:59,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 14994, now seen corresponding path program 1 times [2023-08-29 21:42:59,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:59,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989863459] [2023-08-29 21:42:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:59,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989863459] [2023-08-29 21:42:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989863459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:59,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:59,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:59,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632505626] [2023-08-29 21:42:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:59,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:59,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:59,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 231 [2023-08-29 21:42:59,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:59,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 231 [2023-08-29 21:42:59,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:59,839 INFO L130 PetriNetUnfolder]: 96/221 cut-off events. [2023-08-29 21:42:59,839 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:42:59,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 221 events. 96/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 902 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 434. Up to 210 conditions per place. [2023-08-29 21:42:59,843 INFO L137 encePairwiseOnDemand]: 227/231 looper letters, 30 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-29 21:42:59,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 144 flow [2023-08-29 21:42:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-29 21:42:59,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4963924963924964 [2023-08-29 21:42:59,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-29 21:42:59,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-29 21:42:59,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:59,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-29 21:42:59,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,852 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 60 flow. Second operand 3 states and 344 transitions. [2023-08-29 21:42:59,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 144 flow [2023-08-29 21:42:59,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:42:59,854 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 64 flow [2023-08-29 21:42:59,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-29 21:42:59,855 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -2 predicate places. [2023-08-29 21:42:59,855 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 64 flow [2023-08-29 21:42:59,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:59,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:59,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:42:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:42:59,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:42:59,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 446956440, now seen corresponding path program 1 times [2023-08-29 21:42:59,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:59,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848586726] [2023-08-29 21:42:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:59,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:00,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848586726] [2023-08-29 21:43:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848586726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252751211] [2023-08-29 21:43:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:00,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:00,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:43:00,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:43:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:00,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:43:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:00,279 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 74 treesize of output 70 [2023-08-29 21:43:00,294 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 64 treesize of output 64 [2023-08-29 21:43:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:00,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252751211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:00,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:00,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-29 21:43:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833341748] [2023-08-29 21:43:00,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:00,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:43:00,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:43:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:43:00,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 231 [2023-08-29 21:43:00,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 64 flow. Second operand has 9 states, 9 states have (on average 101.66666666666667) internal successors, (915), 9 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:00,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:00,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 231 [2023-08-29 21:43:00,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:00,744 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-29 21:43:00,744 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 21:43:00,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 46 events. 16/46 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 45. Up to 34 conditions per place. [2023-08-29 21:43:00,744 INFO L137 encePairwiseOnDemand]: 227/231 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-29 21:43:00,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 94 flow [2023-08-29 21:43:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:43:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:43:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 423 transitions. [2023-08-29 21:43:00,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2023-08-29 21:43:00,746 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 423 transitions. [2023-08-29 21:43:00,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 423 transitions. [2023-08-29 21:43:00,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:00,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 423 transitions. [2023-08-29 21:43:00,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:00,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:00,750 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:00,750 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 64 flow. Second operand 4 states and 423 transitions. [2023-08-29 21:43:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 94 flow [2023-08-29 21:43:00,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:00,751 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-29 21:43:00,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-29 21:43:00,753 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -13 predicate places. [2023-08-29 21:43:00,753 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-29 21:43:00,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.66666666666667) internal successors, (915), 9 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:00,755 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:43:00,756 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:43:00,756 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:43:00,756 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:43:00,757 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:43:00,757 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:43:00,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:43:00,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:00,963 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:43:00,965 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:00,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 122 transitions, 252 flow [2023-08-29 21:43:00,982 INFO L130 PetriNetUnfolder]: 18/162 cut-off events. [2023-08-29 21:43:00,982 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:43:00,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 162 events. 18/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 380 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-08-29 21:43:00,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 122 transitions, 252 flow [2023-08-29 21:43:00,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 117 transitions, 239 flow [2023-08-29 21:43:00,984 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:00,984 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 117 transitions, 239 flow [2023-08-29 21:43:00,984 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 117 transitions, 239 flow [2023-08-29 21:43:00,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 239 flow [2023-08-29 21:43:00,995 INFO L130 PetriNetUnfolder]: 17/157 cut-off events. [2023-08-29 21:43:00,995 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:00,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 17/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 361 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-08-29 21:43:00,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-08-29 21:43:04,408 INFO L134 LiptonReduction]: Checked pairs total: 4635 [2023-08-29 21:43:04,409 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-29 21:43:04,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:04,411 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:04,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:04,415 INFO L130 PetriNetUnfolder]: 3/33 cut-off events. [2023-08-29 21:43:04,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:04,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:04,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:43:04,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:04,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash -219239376, now seen corresponding path program 1 times [2023-08-29 21:43:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109317831] [2023-08-29 21:43:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:04,443 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:04,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:04,479 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:04,479 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:04,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:43:04,479 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:04,480 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:04,480 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:04,480 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:43:04,503 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:43:04,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:04,533 INFO L130 PetriNetUnfolder]: 32/261 cut-off events. [2023-08-29 21:43:04,533 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:04,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 261 events. 32/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 768 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-08-29 21:43:04,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:04,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:04,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:04,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:04,537 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:04,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:04,561 INFO L130 PetriNetUnfolder]: 32/261 cut-off events. [2023-08-29 21:43:04,562 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:04,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 261 events. 32/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 768 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-08-29 21:43:04,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-08-29 21:43:07,947 INFO L134 LiptonReduction]: Checked pairs total: 18719 [2023-08-29 21:43:07,947 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-29 21:43:07,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:07,950 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:07,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:43:07,951 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:43:07,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:07,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:07,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:07,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:07,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash 27986, now seen corresponding path program 1 times [2023-08-29 21:43:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:07,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392954599] [2023-08-29 21:43:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:07,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:07,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:07,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392954599] [2023-08-29 21:43:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392954599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:07,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:07,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:07,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648399463] [2023-08-29 21:43:07,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:07,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:07,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:08,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 271 [2023-08-29 21:43:08,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:08,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 271 [2023-08-29 21:43:08,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:08,291 INFO L130 PetriNetUnfolder]: 1625/2994 cut-off events. [2023-08-29 21:43:08,291 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-29 21:43:08,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5727 conditions, 2994 events. 1625/2994 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 18908 event pairs, 1368 based on Foata normal form. 589/3082 useless extension candidates. Maximal degree in co-relation 2943. Up to 2272 conditions per place. [2023-08-29 21:43:08,303 INFO L137 encePairwiseOnDemand]: 251/271 looper letters, 44 selfloop transitions, 2 changer transitions 2/58 dead transitions. [2023-08-29 21:43:08,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 228 flow [2023-08-29 21:43:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-29 21:43:08,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436654366543665 [2023-08-29 21:43:08,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-29 21:43:08,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-29 21:43:08,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:08,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-29 21:43:08,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,309 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 442 transitions. [2023-08-29 21:43:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 228 flow [2023-08-29 21:43:08,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:43:08,312 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 102 flow [2023-08-29 21:43:08,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-29 21:43:08,315 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-29 21:43:08,316 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 102 flow [2023-08-29 21:43:08,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:08,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:08,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:43:08,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:08,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash 27987, now seen corresponding path program 1 times [2023-08-29 21:43:08,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:08,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106943297] [2023-08-29 21:43:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:08,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:08,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:08,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106943297] [2023-08-29 21:43:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106943297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:08,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:08,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:08,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730566774] [2023-08-29 21:43:08,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:08,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:08,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 271 [2023-08-29 21:43:08,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:08,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 271 [2023-08-29 21:43:08,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:08,694 INFO L130 PetriNetUnfolder]: 1500/2702 cut-off events. [2023-08-29 21:43:08,694 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-29 21:43:08,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5298 conditions, 2702 events. 1500/2702 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16595 event pairs, 712 based on Foata normal form. 0/2397 useless extension candidates. Maximal degree in co-relation 4795. Up to 2461 conditions per place. [2023-08-29 21:43:08,704 INFO L137 encePairwiseOnDemand]: 267/271 looper letters, 38 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-29 21:43:08,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 198 flow [2023-08-29 21:43:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-29 21:43:08,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129151291512916 [2023-08-29 21:43:08,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-29 21:43:08,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-29 21:43:08,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:08,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-29 21:43:08,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,711 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 102 flow. Second operand 3 states and 417 transitions. [2023-08-29 21:43:08,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 198 flow [2023-08-29 21:43:08,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 50 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:08,717 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 110 flow [2023-08-29 21:43:08,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-29 21:43:08,718 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-29 21:43:08,719 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 110 flow [2023-08-29 21:43:08,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:08,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:43:08,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:43:08,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:08,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash 97060629, now seen corresponding path program 1 times [2023-08-29 21:43:08,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:08,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421404492] [2023-08-29 21:43:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:08,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:08,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:08,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421404492] [2023-08-29 21:43:08,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421404492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:08,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455829643] [2023-08-29 21:43:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:08,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:08,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:43:08,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:43:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:43:08,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:09,007 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 124 treesize of output 124 [2023-08-29 21:43:09,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 21:43:09,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 94 [2023-08-29 21:43:09,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 21:43:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:09,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455829643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:09,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:09,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-29 21:43:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008783756] [2023-08-29 21:43:09,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:09,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:43:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:43:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:43:09,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 271 [2023-08-29 21:43:09,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 110 flow. Second operand has 9 states, 9 states have (on average 123.66666666666667) internal successors, (1113), 9 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:09,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 271 [2023-08-29 21:43:09,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:09,555 INFO L130 PetriNetUnfolder]: 1347/2318 cut-off events. [2023-08-29 21:43:09,555 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-29 21:43:09,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4710 conditions, 2318 events. 1347/2318 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13183 event pairs, 470 based on Foata normal form. 7/2101 useless extension candidates. Maximal degree in co-relation 670. Up to 1855 conditions per place. [2023-08-29 21:43:09,565 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 63 selfloop transitions, 4 changer transitions 1/78 dead transitions. [2023-08-29 21:43:09,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 314 flow [2023-08-29 21:43:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:43:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:43:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-29 21:43:09,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025830258302583 [2023-08-29 21:43:09,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-29 21:43:09,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-29 21:43:09,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:09,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-29 21:43:09,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,572 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 110 flow. Second operand 5 states and 681 transitions. [2023-08-29 21:43:09,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 314 flow [2023-08-29 21:43:09,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 78 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:43:09,575 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 116 flow [2023-08-29 21:43:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-29 21:43:09,577 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-29 21:43:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 116 flow [2023-08-29 21:43:09,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 123.66666666666667) internal successors, (1113), 9 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:09,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:09,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:43:09,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-29 21:43:09,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:09,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash -117218279, now seen corresponding path program 1 times [2023-08-29 21:43:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:09,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672452322] [2023-08-29 21:43:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:09,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:43:09,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672452322] [2023-08-29 21:43:09,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672452322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:09,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:09,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595227635] [2023-08-29 21:43:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:09,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:09,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 271 [2023-08-29 21:43:09,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:09,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 271 [2023-08-29 21:43:09,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:10,075 INFO L130 PetriNetUnfolder]: 1735/3010 cut-off events. [2023-08-29 21:43:10,076 INFO L131 PetriNetUnfolder]: For 650/650 co-relation queries the response was YES. [2023-08-29 21:43:10,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6404 conditions, 3010 events. 1735/3010 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 17100 event pairs, 612 based on Foata normal form. 0/2829 useless extension candidates. Maximal degree in co-relation 4660. Up to 2583 conditions per place. [2023-08-29 21:43:10,089 INFO L137 encePairwiseOnDemand]: 267/271 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-29 21:43:10,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 276 flow [2023-08-29 21:43:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-29 21:43:10,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239852398523985 [2023-08-29 21:43:10,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-29 21:43:10,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-29 21:43:10,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:10,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-29 21:43:10,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,094 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 116 flow. Second operand 3 states and 426 transitions. [2023-08-29 21:43:10,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 276 flow [2023-08-29 21:43:10,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:10,097 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 127 flow [2023-08-29 21:43:10,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-29 21:43:10,098 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-29 21:43:10,098 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 127 flow [2023-08-29 21:43:10,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:10,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:43:10,099 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:10,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash -241820219, now seen corresponding path program 1 times [2023-08-29 21:43:10,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:10,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130672626] [2023-08-29 21:43:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:10,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130672626] [2023-08-29 21:43:10,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130672626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242109557] [2023-08-29 21:43:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:10,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:43:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:43:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:43:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:10,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:10,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242109557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:10,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:10,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 21:43:10,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937688249] [2023-08-29 21:43:10,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:10,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:43:10,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:43:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:43:10,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 271 [2023-08-29 21:43:10,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 127 flow. Second operand has 8 states, 8 states have (on average 127.625) internal successors, (1021), 8 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:10,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 271 [2023-08-29 21:43:10,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:10,449 INFO L130 PetriNetUnfolder]: 301/583 cut-off events. [2023-08-29 21:43:10,449 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2023-08-29 21:43:10,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 583 events. 301/583 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2714 event pairs, 105 based on Foata normal form. 69/648 useless extension candidates. Maximal degree in co-relation 1027. Up to 370 conditions per place. [2023-08-29 21:43:10,451 INFO L137 encePairwiseOnDemand]: 268/271 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-29 21:43:10,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 229 flow [2023-08-29 21:43:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:43:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:43:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 668 transitions. [2023-08-29 21:43:10,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929889298892989 [2023-08-29 21:43:10,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 668 transitions. [2023-08-29 21:43:10,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 668 transitions. [2023-08-29 21:43:10,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:10,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 668 transitions. [2023-08-29 21:43:10,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,458 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 127 flow. Second operand 5 states and 668 transitions. [2023-08-29 21:43:10,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 229 flow [2023-08-29 21:43:10,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 221 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:10,459 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-29 21:43:10,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-29 21:43:10,460 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -10 predicate places. [2023-08-29 21:43:10,461 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-29 21:43:10,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 127.625) internal successors, (1021), 8 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:10,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:43:10,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:43:10,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:43:10,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:43:10,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:43:10,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:43:10,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:43:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:10,668 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:43:10,668 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:10,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:10,687 INFO L130 PetriNetUnfolder]: 32/261 cut-off events. [2023-08-29 21:43:10,687 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:10,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 261 events. 32/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 768 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-08-29 21:43:10,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:10,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:10,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:10,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:10,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 152 transitions, 322 flow [2023-08-29 21:43:10,705 INFO L130 PetriNetUnfolder]: 32/261 cut-off events. [2023-08-29 21:43:10,705 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:10,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 261 events. 32/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 768 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-08-29 21:43:10,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-08-29 21:43:14,074 INFO L134 LiptonReduction]: Checked pairs total: 16880 [2023-08-29 21:43:14,075 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-29 21:43:14,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:14,076 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:14,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:14,081 INFO L130 PetriNetUnfolder]: 10/68 cut-off events. [2023-08-29 21:43:14,081 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:43:14,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:14,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:43:14,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:14,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -94486250, now seen corresponding path program 1 times [2023-08-29 21:43:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:14,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114821362] [2023-08-29 21:43:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:14,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:14,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:14,122 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:14,122 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:14,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:43:14,122 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:14,123 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:14,123 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:14,123 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:43:14,142 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:43:14,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:14,176 INFO L130 PetriNetUnfolder]: 51/401 cut-off events. [2023-08-29 21:43:14,176 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:43:14,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 401 events. 51/401 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-29 21:43:14,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:14,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:14,181 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:14,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:14,181 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:14,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:14,212 INFO L130 PetriNetUnfolder]: 51/401 cut-off events. [2023-08-29 21:43:14,212 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:43:14,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 401 events. 51/401 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-29 21:43:14,224 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-08-29 21:43:17,391 INFO L134 LiptonReduction]: Checked pairs total: 39227 [2023-08-29 21:43:17,391 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-29 21:43:17,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:17,393 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:17,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:43:17,394 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:43:17,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:17,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:17,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:17,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:17,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:17,395 INFO L85 PathProgramCache]: Analyzing trace with hash 42804, now seen corresponding path program 1 times [2023-08-29 21:43:17,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:17,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748889658] [2023-08-29 21:43:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:17,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:17,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748889658] [2023-08-29 21:43:17,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748889658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:17,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:17,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:17,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068451029] [2023-08-29 21:43:17,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:17,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:17,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:17,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:17,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 314 [2023-08-29 21:43:17,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:17,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:17,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 314 [2023-08-29 21:43:17,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:20,703 INFO L130 PetriNetUnfolder]: 30712/45495 cut-off events. [2023-08-29 21:43:20,703 INFO L131 PetriNetUnfolder]: For 1039/1039 co-relation queries the response was YES. [2023-08-29 21:43:20,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89578 conditions, 45495 events. 30712/45495 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 320102 event pairs, 25801 based on Foata normal form. 9143/48622 useless extension candidates. Maximal degree in co-relation 21268. Up to 36562 conditions per place. [2023-08-29 21:43:20,881 INFO L137 encePairwiseOnDemand]: 288/314 looper letters, 66 selfloop transitions, 2 changer transitions 2/81 dead transitions. [2023-08-29 21:43:20,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 330 flow [2023-08-29 21:43:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-29 21:43:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753715498938429 [2023-08-29 21:43:20,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-29 21:43:20,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-29 21:43:20,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:20,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-29 21:43:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:20,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:20,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:20,888 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 192 flow. Second operand 3 states and 542 transitions. [2023-08-29 21:43:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 330 flow [2023-08-29 21:43:20,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:43:20,892 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 138 flow [2023-08-29 21:43:20,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-29 21:43:20,893 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2023-08-29 21:43:20,894 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 138 flow [2023-08-29 21:43:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:20,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:20,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:43:20,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:20,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:20,895 INFO L85 PathProgramCache]: Analyzing trace with hash 42805, now seen corresponding path program 1 times [2023-08-29 21:43:20,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:20,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432771036] [2023-08-29 21:43:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:20,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:20,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:20,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432771036] [2023-08-29 21:43:20,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432771036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:20,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:20,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261687337] [2023-08-29 21:43:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:20,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:20,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:20,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-29 21:43:20,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:20,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:20,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-29 21:43:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:23,147 INFO L130 PetriNetUnfolder]: 28311/42516 cut-off events. [2023-08-29 21:43:23,147 INFO L131 PetriNetUnfolder]: For 1746/1746 co-relation queries the response was YES. [2023-08-29 21:43:23,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84131 conditions, 42516 events. 28311/42516 cut-off events. For 1746/1746 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 298890 event pairs, 18305 based on Foata normal form. 0/38680 useless extension candidates. Maximal degree in co-relation 76160. Up to 39945 conditions per place. [2023-08-29 21:43:23,360 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 52 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-29 21:43:23,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 266 flow [2023-08-29 21:43:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-08-29 21:43:23,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276008492569002 [2023-08-29 21:43:23,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-08-29 21:43:23,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-08-29 21:43:23,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:23,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-08-29 21:43:23,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:23,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:23,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:23,370 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 138 flow. Second operand 3 states and 497 transitions. [2023-08-29 21:43:23,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 266 flow [2023-08-29 21:43:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 260 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:23,467 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 146 flow [2023-08-29 21:43:23,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-29 21:43:23,469 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -3 predicate places. [2023-08-29 21:43:23,469 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 146 flow [2023-08-29 21:43:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:23,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:23,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:43:23,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:43:23,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:23,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 910657663, now seen corresponding path program 1 times [2023-08-29 21:43:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844380367] [2023-08-29 21:43:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:23,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844380367] [2023-08-29 21:43:23,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844380367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:23,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112333300] [2023-08-29 21:43:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:23,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:23,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:43:23,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:43:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:23,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:43:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:23,705 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 74 treesize of output 74 [2023-08-29 21:43:23,714 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 68 treesize of output 64 [2023-08-29 21:43:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:23,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112333300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:24,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:24,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 6 [2023-08-29 21:43:24,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46463970] [2023-08-29 21:43:24,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:24,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:43:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:43:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:43:24,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 314 [2023-08-29 21:43:24,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:24,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:24,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 314 [2023-08-29 21:43:24,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:26,297 INFO L130 PetriNetUnfolder]: 26240/39183 cut-off events. [2023-08-29 21:43:26,297 INFO L131 PetriNetUnfolder]: For 2119/2119 co-relation queries the response was YES. [2023-08-29 21:43:26,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78507 conditions, 39183 events. 26240/39183 cut-off events. For 2119/2119 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 275513 event pairs, 7224 based on Foata normal form. 0/36018 useless extension candidates. Maximal degree in co-relation 69785. Up to 33348 conditions per place. [2023-08-29 21:43:26,437 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 101 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2023-08-29 21:43:26,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 117 transitions, 485 flow [2023-08-29 21:43:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:43:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:43:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 828 transitions. [2023-08-29 21:43:26,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5273885350318471 [2023-08-29 21:43:26,440 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 828 transitions. [2023-08-29 21:43:26,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 828 transitions. [2023-08-29 21:43:26,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:26,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 828 transitions. [2023-08-29 21:43:26,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:26,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:26,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:26,448 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 146 flow. Second operand 5 states and 828 transitions. [2023-08-29 21:43:26,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 117 transitions, 485 flow [2023-08-29 21:43:26,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 117 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:43:26,451 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 161 flow [2023-08-29 21:43:26,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-29 21:43:26,451 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-08-29 21:43:26,452 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 161 flow [2023-08-29 21:43:26,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:26,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:26,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:26,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:43:26,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:26,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:26,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:26,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1031285949, now seen corresponding path program 1 times [2023-08-29 21:43:26,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:26,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451028436] [2023-08-29 21:43:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:26,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:43:26,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451028436] [2023-08-29 21:43:26,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451028436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:26,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:26,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265337689] [2023-08-29 21:43:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:26,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-08-29 21:43:26,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:26,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:26,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-08-29 21:43:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:28,677 INFO L130 PetriNetUnfolder]: 26201/39093 cut-off events. [2023-08-29 21:43:28,677 INFO L131 PetriNetUnfolder]: For 5055/5055 co-relation queries the response was YES. [2023-08-29 21:43:28,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80300 conditions, 39093 events. 26201/39093 cut-off events. For 5055/5055 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 267812 event pairs, 11041 based on Foata normal form. 0/37242 useless extension candidates. Maximal degree in co-relation 55344. Up to 35905 conditions per place. [2023-08-29 21:43:28,813 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 66 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-29 21:43:28,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 381 flow [2023-08-29 21:43:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-29 21:43:28,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307855626326964 [2023-08-29 21:43:28,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-29 21:43:28,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-29 21:43:28,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:28,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-29 21:43:28,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:28,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:28,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:28,822 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 161 flow. Second operand 3 states and 500 transitions. [2023-08-29 21:43:28,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 381 flow [2023-08-29 21:43:28,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:43:28,830 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 182 flow [2023-08-29 21:43:28,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-29 21:43:28,831 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-08-29 21:43:28,831 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 182 flow [2023-08-29 21:43:28,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:28,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:28,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:43:28,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:28,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1138430065, now seen corresponding path program 1 times [2023-08-29 21:43:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917659386] [2023-08-29 21:43:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:28,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:28,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:28,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917659386] [2023-08-29 21:43:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917659386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712254351] [2023-08-29 21:43:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:28,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:28,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:43:28,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:43:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 21:43:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:28,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:43:28,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 21:43:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:29,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:29,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712254351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:29,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:29,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 11 [2023-08-29 21:43:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938957606] [2023-08-29 21:43:29,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:43:29,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:43:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:43:29,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 314 [2023-08-29 21:43:29,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:29,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:29,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 314 [2023-08-29 21:43:29,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:31,579 INFO L130 PetriNetUnfolder]: 24366/36335 cut-off events. [2023-08-29 21:43:31,580 INFO L131 PetriNetUnfolder]: For 7082/7082 co-relation queries the response was YES. [2023-08-29 21:43:31,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78136 conditions, 36335 events. 24366/36335 cut-off events. For 7082/7082 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 253757 event pairs, 4887 based on Foata normal form. 9/35909 useless extension candidates. Maximal degree in co-relation 40325. Up to 23630 conditions per place. [2023-08-29 21:43:31,722 INFO L137 encePairwiseOnDemand]: 306/314 looper letters, 124 selfloop transitions, 8 changer transitions 0/143 dead transitions. [2023-08-29 21:43:31,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 143 transitions, 654 flow [2023-08-29 21:43:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:43:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:43:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 957 transitions. [2023-08-29 21:43:31,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079617834394905 [2023-08-29 21:43:31,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 957 transitions. [2023-08-29 21:43:31,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 957 transitions. [2023-08-29 21:43:31,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:31,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 957 transitions. [2023-08-29 21:43:31,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.5) internal successors, (957), 6 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:31,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:31,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:31,737 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 182 flow. Second operand 6 states and 957 transitions. [2023-08-29 21:43:31,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 143 transitions, 654 flow [2023-08-29 21:43:31,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 636 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:43:31,746 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 207 flow [2023-08-29 21:43:31,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-29 21:43:31,748 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 7 predicate places. [2023-08-29 21:43:31,748 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 207 flow [2023-08-29 21:43:31,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:31,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:31,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:31,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:43:31,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 21:43:31,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:31,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash -225816379, now seen corresponding path program 1 times [2023-08-29 21:43:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15777246] [2023-08-29 21:43:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:43:31,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:31,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15777246] [2023-08-29 21:43:31,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15777246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:31,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:43:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641136505] [2023-08-29 21:43:31,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:31,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:31,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-29 21:43:31,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:31,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:31,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-29 21:43:31,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:33,809 INFO L130 PetriNetUnfolder]: 22420/33215 cut-off events. [2023-08-29 21:43:33,809 INFO L131 PetriNetUnfolder]: For 12687/12720 co-relation queries the response was YES. [2023-08-29 21:43:33,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77058 conditions, 33215 events. 22420/33215 cut-off events. For 12687/12720 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 224226 event pairs, 16892 based on Foata normal form. 810/33861 useless extension candidates. Maximal degree in co-relation 52230. Up to 25382 conditions per place. [2023-08-29 21:43:33,927 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 78 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-29 21:43:33,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 448 flow [2023-08-29 21:43:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 21:43:33,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488322717622081 [2023-08-29 21:43:33,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 21:43:33,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 21:43:33,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:33,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 21:43:33,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:33,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:33,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:33,933 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 207 flow. Second operand 3 states and 517 transitions. [2023-08-29 21:43:33,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 448 flow [2023-08-29 21:43:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 438 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:43:33,966 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 206 flow [2023-08-29 21:43:33,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-08-29 21:43:33,967 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2023-08-29 21:43:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 206 flow [2023-08-29 21:43:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:33,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:33,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:33,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:43:33,968 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:33,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1385784219, now seen corresponding path program 1 times [2023-08-29 21:43:33,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:33,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014983903] [2023-08-29 21:43:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:34,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:34,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014983903] [2023-08-29 21:43:34,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014983903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:34,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75214586] [2023-08-29 21:43:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:34,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:34,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:34,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:43:34,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:43:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:43:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:34,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75214586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:34,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 21:43:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525746637] [2023-08-29 21:43:34,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:43:34,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:43:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:43:34,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-29 21:43:34,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:34,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:34,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-29 21:43:34,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:34,986 INFO L130 PetriNetUnfolder]: 5560/8383 cut-off events. [2023-08-29 21:43:34,987 INFO L131 PetriNetUnfolder]: For 3493/3493 co-relation queries the response was YES. [2023-08-29 21:43:34,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19194 conditions, 8383 events. 5560/8383 cut-off events. For 3493/3493 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 49454 event pairs, 0 based on Foata normal form. 810/9192 useless extension candidates. Maximal degree in co-relation 19181. Up to 5346 conditions per place. [2023-08-29 21:43:35,005 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2023-08-29 21:43:35,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 101 transitions, 450 flow [2023-08-29 21:43:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:43:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:43:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 967 transitions. [2023-08-29 21:43:35,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132696390658175 [2023-08-29 21:43:35,008 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 967 transitions. [2023-08-29 21:43:35,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 967 transitions. [2023-08-29 21:43:35,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:35,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 967 transitions. [2023-08-29 21:43:35,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:35,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:35,014 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:35,014 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 206 flow. Second operand 6 states and 967 transitions. [2023-08-29 21:43:35,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 101 transitions, 450 flow [2023-08-29 21:43:35,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 445 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:43:35,018 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-29 21:43:35,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-08-29 21:43:35,019 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -3 predicate places. [2023-08-29 21:43:35,019 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-29 21:43:35,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:35,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:43:35,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:43:35,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:43:35,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:43:35,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:43:35,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:43:35,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 21:43:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-29 21:43:35,229 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:35,230 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:35,266 INFO L130 PetriNetUnfolder]: 51/401 cut-off events. [2023-08-29 21:43:35,266 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:43:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 401 events. 51/401 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-29 21:43:35,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:35,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:35,270 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:35,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:35,270 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 182 transitions, 394 flow [2023-08-29 21:43:35,303 INFO L130 PetriNetUnfolder]: 51/401 cut-off events. [2023-08-29 21:43:35,304 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:43:35,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 401 events. 51/401 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-29 21:43:35,313 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-08-29 21:43:38,842 INFO L134 LiptonReduction]: Checked pairs total: 39206 [2023-08-29 21:43:38,842 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-29 21:43:38,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:38,843 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:38,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:38,850 INFO L130 PetriNetUnfolder]: 19/108 cut-off events. [2023-08-29 21:43:38,850 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:43:38,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:38,851 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:43:38,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:38,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash 65982565, now seen corresponding path program 1 times [2023-08-29 21:43:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:38,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289899484] [2023-08-29 21:43:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:38,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:38,866 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:38,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:38,879 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:38,879 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:38,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:43:38,879 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:38,880 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:38,880 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:38,880 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:43:38,896 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:43:38,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 212 transitions, 468 flow [2023-08-29 21:43:38,946 INFO L130 PetriNetUnfolder]: 82/625 cut-off events. [2023-08-29 21:43:38,946 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:43:38,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 625 events. 82/625 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2516 event pairs, 6 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 421. Up to 32 conditions per place. [2023-08-29 21:43:38,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 212 transitions, 468 flow [2023-08-29 21:43:38,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 212 transitions, 468 flow [2023-08-29 21:43:38,953 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:38,953 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 212 transitions, 468 flow [2023-08-29 21:43:38,953 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 212 transitions, 468 flow [2023-08-29 21:43:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 212 transitions, 468 flow [2023-08-29 21:43:39,001 INFO L130 PetriNetUnfolder]: 82/625 cut-off events. [2023-08-29 21:43:39,002 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:43:39,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 625 events. 82/625 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2516 event pairs, 6 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 421. Up to 32 conditions per place. [2023-08-29 21:43:39,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-08-29 21:43:42,391 INFO L134 LiptonReduction]: Checked pairs total: 65494 [2023-08-29 21:43:42,391 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-29 21:43:42,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:42,393 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:42,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:43:42,393 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:43:42,393 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:42,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:42,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:42,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:42,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash 59601, now seen corresponding path program 1 times [2023-08-29 21:43:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:42,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283081786] [2023-08-29 21:43:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:42,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:42,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283081786] [2023-08-29 21:43:42,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283081786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:42,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:42,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:42,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124804237] [2023-08-29 21:43:42,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:42,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:42,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:42,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2023-08-29 21:43:42,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:42,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:42,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2023-08-29 21:43:42,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:44:06,224 INFO L130 PetriNetUnfolder]: 276210/381717 cut-off events. [2023-08-29 21:44:06,224 INFO L131 PetriNetUnfolder]: For 12213/12213 co-relation queries the response was YES. [2023-08-29 21:44:06,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750570 conditions, 381717 events. 276210/381717 cut-off events. For 12213/12213 co-relation queries the response was YES. Maximal size of possible extension queue 8558. Compared 3023823 event pairs, 229706 based on Foata normal form. 65615/406070 useless extension candidates. Maximal degree in co-relation 71768. Up to 301814 conditions per place. [2023-08-29 21:44:08,032 INFO L137 encePairwiseOnDemand]: 330/361 looper letters, 78 selfloop transitions, 2 changer transitions 2/99 dead transitions. [2023-08-29 21:44:08,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 404 flow [2023-08-29 21:44:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:44:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:44:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-08-29 21:44:08,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58264081255771 [2023-08-29 21:44:08,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-08-29 21:44:08,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-08-29 21:44:08,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:44:08,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-08-29 21:44:08,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:08,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:08,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:08,039 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 240 flow. Second operand 3 states and 631 transitions. [2023-08-29 21:44:08,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 404 flow [2023-08-29 21:44:08,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:44:08,042 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 176 flow [2023-08-29 21:44:08,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-08-29 21:44:08,042 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-08-29 21:44:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 176 flow [2023-08-29 21:44:08,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:08,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:08,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:44:08,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:44:08,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:44:08,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash 59602, now seen corresponding path program 1 times [2023-08-29 21:44:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:08,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423148861] [2023-08-29 21:44:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:44:08,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423148861] [2023-08-29 21:44:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423148861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:44:08,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:44:08,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:44:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776346449] [2023-08-29 21:44:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:44:08,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:44:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:44:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:44:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 361 [2023-08-29 21:44:08,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:08,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:08,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 361 [2023-08-29 21:44:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:44:29,132 INFO L130 PetriNetUnfolder]: 253367/352628 cut-off events. [2023-08-29 21:44:29,132 INFO L131 PetriNetUnfolder]: For 16193/16193 co-relation queries the response was YES. [2023-08-29 21:44:29,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697866 conditions, 352628 events. 253367/352628 cut-off events. For 16193/16193 co-relation queries the response was YES. Maximal size of possible extension queue 7991. Compared 2782012 event pairs, 205976 based on Foata normal form. 0/327194 useless extension candidates. Maximal degree in co-relation 628931. Up to 331930 conditions per place. [2023-08-29 21:44:30,889 INFO L137 encePairwiseOnDemand]: 357/361 looper letters, 58 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-29 21:44:30,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 314 flow [2023-08-29 21:44:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:44:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:44:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-29 21:44:30,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253924284395198 [2023-08-29 21:44:30,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-29 21:44:30,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-29 21:44:30,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:44:30,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-29 21:44:30,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:30,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:30,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:30,895 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 176 flow. Second operand 3 states and 569 transitions. [2023-08-29 21:44:30,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 314 flow [2023-08-29 21:44:33,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 308 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:44:33,513 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 184 flow [2023-08-29 21:44:33,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2023-08-29 21:44:33,514 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -2 predicate places. [2023-08-29 21:44:33,514 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 184 flow [2023-08-29 21:44:33,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:33,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:33,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:44:33,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:44:33,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:44:33,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash -741278821, now seen corresponding path program 1 times [2023-08-29 21:44:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:33,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775210946] [2023-08-29 21:44:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:44:33,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775210946] [2023-08-29 21:44:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775210946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:44:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185420833] [2023-08-29 21:44:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:33,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:44:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:44:33,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:44:33,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:44:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:44:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:44:33,698 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 88 treesize of output 84 [2023-08-29 21:44:33,703 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 78 treesize of output 78 [2023-08-29 21:44:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:44:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:44:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:44:33,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185420833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:44:33,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:44:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-29 21:44:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780504533] [2023-08-29 21:44:33,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:44:33,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:44:33,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:44:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:44:33,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2023-08-29 21:44:33,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 167.66666666666666) internal successors, (1509), 9 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:33,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:33,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2023-08-29 21:44:33,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:44:55,361 INFO L130 PetriNetUnfolder]: 235669/325808 cut-off events. [2023-08-29 21:44:55,361 INFO L131 PetriNetUnfolder]: For 20246/20246 co-relation queries the response was YES. [2023-08-29 21:44:55,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650699 conditions, 325808 events. 235669/325808 cut-off events. For 20246/20246 co-relation queries the response was YES. Maximal size of possible extension queue 7424. Compared 2528408 event pairs, 149179 based on Foata normal form. 8/303635 useless extension candidates. Maximal degree in co-relation 92059. Up to 278717 conditions per place. [2023-08-29 21:44:56,901 INFO L137 encePairwiseOnDemand]: 356/361 looper letters, 100 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-29 21:44:56,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 121 transitions, 496 flow [2023-08-29 21:44:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:44:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:44:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 937 transitions. [2023-08-29 21:44:56,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191135734072022 [2023-08-29 21:44:56,904 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 937 transitions. [2023-08-29 21:44:56,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 937 transitions. [2023-08-29 21:44:56,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:44:56,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 937 transitions. [2023-08-29 21:44:56,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:56,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:56,909 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:56,909 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 184 flow. Second operand 5 states and 937 transitions. [2023-08-29 21:44:56,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 121 transitions, 496 flow [2023-08-29 21:44:56,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 121 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:44:56,920 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 196 flow [2023-08-29 21:44:56,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-08-29 21:44:56,921 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-08-29 21:44:56,921 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 196 flow [2023-08-29 21:44:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.66666666666666) internal successors, (1509), 9 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:56,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:56,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:44:56,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 21:44:57,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:44:57,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:44:57,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1779096522, now seen corresponding path program 1 times [2023-08-29 21:44:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:57,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120047222] [2023-08-29 21:44:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:44:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:57,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120047222] [2023-08-29 21:44:57,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120047222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:44:57,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:44:57,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:44:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188337141] [2023-08-29 21:44:57,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:44:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:44:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:44:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:44:57,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 361 [2023-08-29 21:44:57,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:57,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:57,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 361 [2023-08-29 21:44:57,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:23,969 INFO L130 PetriNetUnfolder]: 334772/455855 cut-off events. [2023-08-29 21:45:23,970 INFO L131 PetriNetUnfolder]: For 66163/66163 co-relation queries the response was YES. [2023-08-29 21:45:24,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939989 conditions, 455855 events. 334772/455855 cut-off events. For 66163/66163 co-relation queries the response was YES. Maximal size of possible extension queue 9376. Compared 3443441 event pairs, 164379 based on Foata normal form. 0/438334 useless extension candidates. Maximal degree in co-relation 658361. Up to 432910 conditions per place. [2023-08-29 21:45:26,090 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 77 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-08-29 21:45:26,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 454 flow [2023-08-29 21:45:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2023-08-29 21:45:26,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300092336103417 [2023-08-29 21:45:26,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2023-08-29 21:45:26,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2023-08-29 21:45:26,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:26,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2023-08-29 21:45:26,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:26,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:26,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:26,096 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 196 flow. Second operand 3 states and 574 transitions. [2023-08-29 21:45:26,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 454 flow [2023-08-29 21:45:29,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 440 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:45:29,288 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 221 flow [2023-08-29 21:45:29,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-08-29 21:45:29,288 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-08-29 21:45:29,288 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 221 flow [2023-08-29 21:45:29,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:29,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:29,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:29,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:45:29,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:29,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1167706396, now seen corresponding path program 1 times [2023-08-29 21:45:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:29,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252131250] [2023-08-29 21:45:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:45:29,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252131250] [2023-08-29 21:45:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252131250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:29,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:45:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243418856] [2023-08-29 21:45:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:29,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 361 [2023-08-29 21:45:29,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:29,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:29,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 361 [2023-08-29 21:45:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:50,857 INFO L130 PetriNetUnfolder]: 247752/342524 cut-off events. [2023-08-29 21:45:50,858 INFO L131 PetriNetUnfolder]: For 71841/71845 co-relation queries the response was YES. [2023-08-29 21:45:51,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731907 conditions, 342524 events. 247752/342524 cut-off events. For 71841/71845 co-relation queries the response was YES. Maximal size of possible extension queue 7596. Compared 2679961 event pairs, 172485 based on Foata normal form. 0/326539 useless extension candidates. Maximal degree in co-relation 449583. Up to 239567 conditions per place. [2023-08-29 21:45:52,554 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 92 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-29 21:45:52,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 513 flow [2023-08-29 21:45:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-29 21:45:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512465373961218 [2023-08-29 21:45:52,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-29 21:45:52,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-29 21:45:52,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:52,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-29 21:45:52,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:52,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:52,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:52,560 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 221 flow. Second operand 3 states and 597 transitions. [2023-08-29 21:45:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 513 flow [2023-08-29 21:45:52,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:45:52,589 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 228 flow [2023-08-29 21:45:52,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-29 21:45:52,590 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-08-29 21:45:52,590 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 228 flow [2023-08-29 21:45:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:52,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:52,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:52,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:45:52,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:52,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1167706466, now seen corresponding path program 1 times [2023-08-29 21:45:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165381620] [2023-08-29 21:45:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:45:52,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:52,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165381620] [2023-08-29 21:45:52,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165381620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:45:52,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954497709] [2023-08-29 21:45:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:52,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:52,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:45:52,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:45:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 21:45:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:45:52,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:45:52,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 21:45:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:45:52,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:45:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954497709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:52,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:45:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2023-08-29 21:45:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717991990] [2023-08-29 21:45:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:45:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:45:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-29 21:45:52,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 361 [2023-08-29 21:45:52,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:52,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:52,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 361 [2023-08-29 21:45:52,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:46:11,907 INFO L130 PetriNetUnfolder]: 228412/307922 cut-off events. [2023-08-29 21:46:11,908 INFO L131 PetriNetUnfolder]: For 57868/57868 co-relation queries the response was YES. [2023-08-29 21:46:12,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683718 conditions, 307922 events. 228412/307922 cut-off events. For 57868/57868 co-relation queries the response was YES. Maximal size of possible extension queue 6750. Compared 2305639 event pairs, 33503 based on Foata normal form. 0/303203 useless extension candidates. Maximal degree in co-relation 447970. Up to 184099 conditions per place. [2023-08-29 21:46:13,585 INFO L137 encePairwiseOnDemand]: 354/361 looper letters, 147 selfloop transitions, 8 changer transitions 0/173 dead transitions. [2023-08-29 21:46:13,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 173 transitions, 777 flow [2023-08-29 21:46:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:46:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:46:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 955 transitions. [2023-08-29 21:46:13,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290858725761773 [2023-08-29 21:46:13,588 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 955 transitions. [2023-08-29 21:46:13,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 955 transitions. [2023-08-29 21:46:13,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:46:13,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 955 transitions. [2023-08-29 21:46:13,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:13,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:13,592 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 361.0) internal successors, (2166), 6 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:13,592 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 228 flow. Second operand 5 states and 955 transitions. [2023-08-29 21:46:13,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 173 transitions, 777 flow [2023-08-29 21:46:23,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 173 transitions, 775 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:46:23,400 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 257 flow [2023-08-29 21:46:23,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-08-29 21:46:23,400 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 8 predicate places. [2023-08-29 21:46:23,400 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 257 flow [2023-08-29 21:46:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:23,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:23,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:46:23,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:46:23,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-29 21:46:23,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:46:23,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:23,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2131230963, now seen corresponding path program 1 times [2023-08-29 21:46:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985056693] [2023-08-29 21:46:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:46:23,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:46:23,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985056693] [2023-08-29 21:46:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985056693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:46:23,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585484316] [2023-08-29 21:46:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:23,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:46:23,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:46:23,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:46:23,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:46:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:46:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:46:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:46:23,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:46:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:46:23,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585484316] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:46:23,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:46:23,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 21:46:23,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071129637] [2023-08-29 21:46:23,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:46:23,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:46:23,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:46:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:46:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:46:23,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 361 [2023-08-29 21:46:23,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:23,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:46:23,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 361 [2023-08-29 21:46:23,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:46:28,046 INFO L130 PetriNetUnfolder]: 53875/73712 cut-off events. [2023-08-29 21:46:28,046 INFO L131 PetriNetUnfolder]: For 68471/68471 co-relation queries the response was YES. [2023-08-29 21:46:28,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182730 conditions, 73712 events. 53875/73712 cut-off events. For 68471/68471 co-relation queries the response was YES. Maximal size of possible extension queue 2031. Compared 492903 event pairs, 1883 based on Foata normal form. 5793/79160 useless extension candidates. Maximal degree in co-relation 182717. Up to 46485 conditions per place. [2023-08-29 21:46:28,226 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 0 selfloop transitions, 0 changer transitions 140/140 dead transitions. [2023-08-29 21:46:28,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 140 transitions, 637 flow [2023-08-29 21:46:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:46:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:46:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1300 transitions. [2023-08-29 21:46:28,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144440047487139 [2023-08-29 21:46:28,229 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1300 transitions. [2023-08-29 21:46:28,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1300 transitions. [2023-08-29 21:46:28,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:46:28,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1300 transitions. [2023-08-29 21:46:28,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 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) [2023-08-29 21:46:28,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,235 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 361.0) internal successors, (2888), 8 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,235 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 257 flow. Second operand 7 states and 1300 transitions. [2023-08-29 21:46:28,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 140 transitions, 637 flow [2023-08-29 21:46:28,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 140 transitions, 621 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 21:46:28,254 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-08-29 21:46:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-08-29 21:46:28,254 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2023-08-29 21:46:28,254 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-08-29 21:46:28,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:46:28,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:46:28,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:46:28,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:46:28,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:46:28,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:46:28,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 21:46:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-29 21:46:28,457 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:46:28,457 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:46:28,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 212 transitions, 468 flow [2023-08-29 21:46:28,493 INFO L130 PetriNetUnfolder]: 82/625 cut-off events. [2023-08-29 21:46:28,493 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:46:28,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 625 events. 82/625 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2516 event pairs, 6 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 421. Up to 32 conditions per place. [2023-08-29 21:46:28,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 212 transitions, 468 flow [2023-08-29 21:46:28,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 212 transitions, 468 flow [2023-08-29 21:46:28,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:46:28,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 212 transitions, 468 flow [2023-08-29 21:46:28,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 212 transitions, 468 flow [2023-08-29 21:46:28,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 212 transitions, 468 flow [2023-08-29 21:46:28,537 INFO L130 PetriNetUnfolder]: 82/625 cut-off events. [2023-08-29 21:46:28,537 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:46:28,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 625 events. 82/625 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2516 event pairs, 6 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 421. Up to 32 conditions per place. [2023-08-29 21:46:28,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-08-29 21:46:31,893 INFO L134 LiptonReduction]: Checked pairs total: 65522 [2023-08-29 21:46:31,894 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-29 21:46:31,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:46:31,895 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:46:31,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:46:31,906 INFO L130 PetriNetUnfolder]: 33/166 cut-off events. [2023-08-29 21:46:31,906 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:46:31,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:31,906 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:46:31,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:46:31,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1444350778, now seen corresponding path program 1 times [2023-08-29 21:46:31,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:31,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548631167] [2023-08-29 21:46:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:31,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:46:31,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:46:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:46:31,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:46:31,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:46:31,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:46:31,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 21:46:31,933 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:46:31,933 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:46:31,933 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:46:31,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:46:31,958 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:46:31,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 242 transitions, 544 flow [2023-08-29 21:46:32,067 INFO L130 PetriNetUnfolder]: 141/1021 cut-off events. [2023-08-29 21:46:32,067 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:46:32,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1021 events. 141/1021 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5032 event pairs, 23 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 670. Up to 80 conditions per place. [2023-08-29 21:46:32,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 242 transitions, 544 flow [2023-08-29 21:46:32,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 242 transitions, 544 flow [2023-08-29 21:46:32,081 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:46:32,081 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 242 transitions, 544 flow [2023-08-29 21:46:32,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 242 transitions, 544 flow [2023-08-29 21:46:32,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 242 transitions, 544 flow [2023-08-29 21:46:32,184 INFO L130 PetriNetUnfolder]: 141/1021 cut-off events. [2023-08-29 21:46:32,184 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:46:32,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1021 events. 141/1021 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5032 event pairs, 23 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 670. Up to 80 conditions per place. [2023-08-29 21:46:32,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 31360 [2023-08-29 21:46:35,519 INFO L134 LiptonReduction]: Checked pairs total: 98459 [2023-08-29 21:46:35,520 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-08-29 21:46:35,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:46:35,521 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;@3382a3a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:46:35,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:46:35,522 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:46:35,523 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:46:35,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:35,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:46:35,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:46:35,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:35,523 INFO L85 PathProgramCache]: Analyzing trace with hash 78226, now seen corresponding path program 1 times [2023-08-29 21:46:35,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:35,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696286848] [2023-08-29 21:46:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:35,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:46:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:46:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696286848] [2023-08-29 21:46:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696286848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:46:35,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:46:35,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:46:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396845831] [2023-08-29 21:46:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:46:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:46:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:46:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:46:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:46:35,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 405 [2023-08-29 21:46:35,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:35,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:46:35,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 405 [2023-08-29 21:46:35,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand